diff --git a/flask/files/.platform.app.yaml b/flask/files/.platform.app.yaml
index 3bf46b305..41a2d5491 100644
--- a/flask/files/.platform.app.yaml
+++ b/flask/files/.platform.app.yaml
@@ -7,13 +7,17 @@
 name: app
 
 # The runtime the application uses.
-type: "python:2.7"
+type: "python:3.7"
 
+# The build-time dependencies of the app.
+dependencies:
+    python:
+        pipenv: "2018.10.13"
 
 # The hooks executed at various points in the lifecycle of the application.
 hooks:
     build: |
-      pip install -r requirements.txt
+      pipenv install --system --deploy
 
 # The size of the persistent disk of the application (in MB).
 disk: 1024
diff --git a/flask/files/Pipfile b/flask/files/Pipfile
new file mode 100644
index 000000000..f5d4ea525
--- /dev/null
+++ b/flask/files/Pipfile
@@ -0,0 +1,15 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+flask = "*"
+redis = "*"
+pymysql = "*"
+gevent = "*"
+
+[dev-packages]
+
+[requires]
+python_version = "3.7"
diff --git a/flask/files/Pipfile.lock b/flask/files/Pipfile.lock
new file mode 100644
index 000000000..24fbc6315
--- /dev/null
+++ b/flask/files/Pipfile.lock
@@ -0,0 +1,248 @@
+{
+    "_meta": {
+        "hash": {
+            "sha256": "5eca26c114de5dde98d935448b2914516d25c2ac98cf7a1d5afd453441542475"
+        },
+        "pipfile-spec": 6,
+        "requires": {
+            "python_version": "3.7"
+        },
+        "sources": [
+            {
+                "name": "pypi",
+                "url": "https://pypi.org/simple",
+                "verify_ssl": true
+            }
+        ]
+    },
+    "default": {
+        "asn1crypto": {
+            "hashes": [
+                "sha256:2f1adbb7546ed199e3c90ef23ec95c5cf3585bac7d11fb7eb562a3fe89c64e87",
+                "sha256:9d5c20441baf0cb60a4ac34cc447c6c189024b6b4c6cd7877034f4965c464e49"
+            ],
+            "version": "==0.24.0"
+        },
+        "cffi": {
+            "hashes": [
+                "sha256:151b7eefd035c56b2b2e1eb9963c90c6302dc15fbd8c1c0a83a163ff2c7d7743",
+                "sha256:1553d1e99f035ace1c0544050622b7bc963374a00c467edafac50ad7bd276aef",
+                "sha256:1b0493c091a1898f1136e3f4f991a784437fac3673780ff9de3bcf46c80b6b50",
+                "sha256:2ba8a45822b7aee805ab49abfe7eec16b90587f7f26df20c71dd89e45a97076f",
+                "sha256:3bb6bd7266598f318063e584378b8e27c67de998a43362e8fce664c54ee52d30",
+                "sha256:3c85641778460581c42924384f5e68076d724ceac0f267d66c757f7535069c93",
+                "sha256:3eb6434197633b7748cea30bf0ba9f66727cdce45117a712b29a443943733257",
+                "sha256:495c5c2d43bf6cebe0178eb3e88f9c4aa48d8934aa6e3cddb865c058da76756b",
+                "sha256:4c91af6e967c2015729d3e69c2e51d92f9898c330d6a851bf8f121236f3defd3",
+                "sha256:57b2533356cb2d8fac1555815929f7f5f14d68ac77b085d2326b571310f34f6e",
+                "sha256:770f3782b31f50b68627e22f91cb182c48c47c02eb405fd689472aa7b7aa16dc",
+                "sha256:79f9b6f7c46ae1f8ded75f68cf8ad50e5729ed4d590c74840471fc2823457d04",
+                "sha256:7a33145e04d44ce95bcd71e522b478d282ad0eafaf34fe1ec5bbd73e662f22b6",
+                "sha256:857959354ae3a6fa3da6651b966d13b0a8bed6bbc87a0de7b38a549db1d2a359",
+                "sha256:87f37fe5130574ff76c17cab61e7d2538a16f843bb7bca8ebbc4b12de3078596",
+                "sha256:95d5251e4b5ca00061f9d9f3d6fe537247e145a8524ae9fd30a2f8fbce993b5b",
+                "sha256:9d1d3e63a4afdc29bd76ce6aa9d58c771cd1599fbba8cf5057e7860b203710dd",
+                "sha256:a36c5c154f9d42ec176e6e620cb0dd275744aa1d804786a71ac37dc3661a5e95",
+                "sha256:a6a5cb8809091ec9ac03edde9304b3ad82ad4466333432b16d78ef40e0cce0d5",
+                "sha256:ae5e35a2c189d397b91034642cb0eab0e346f776ec2eb44a49a459e6615d6e2e",
+                "sha256:b0f7d4a3df8f06cf49f9f121bead236e328074de6449866515cea4907bbc63d6",
+                "sha256:b75110fb114fa366b29a027d0c9be3709579602ae111ff61674d28c93606acca",
+                "sha256:ba5e697569f84b13640c9e193170e89c13c6244c24400fc57e88724ef610cd31",
+                "sha256:be2a9b390f77fd7676d80bc3cdc4f8edb940d8c198ed2d8c0be1319018c778e1",
+                "sha256:ca1bd81f40adc59011f58159e4aa6445fc585a32bb8ac9badf7a2c1aa23822f2",
+                "sha256:d5d8555d9bfc3f02385c1c37e9f998e2011f0db4f90e250e5bc0c0a85a813085",
+                "sha256:e55e22ac0a30023426564b1059b035973ec82186ddddbac867078435801c7801",
+                "sha256:e90f17980e6ab0f3c2f3730e56d1fe9bcba1891eeea58966e89d352492cc74f4",
+                "sha256:ecbb7b01409e9b782df5ded849c178a0aa7c906cf8c5a67368047daab282b184",
+                "sha256:ed01918d545a38998bfa5902c7c00e0fee90e957ce036a4000a88e3fe2264917",
+                "sha256:edabd457cd23a02965166026fd9bfd196f4324fe6032e866d0f3bd0301cd486f",
+                "sha256:fdf1c1dc5bafc32bc5d08b054f94d659422b05aba244d6be4ddc1c72d9aa70fb"
+            ],
+            "version": "==1.11.5"
+        },
+        "click": {
+            "hashes": [
+                "sha256:2335065e6395b9e67ca716de5f7526736bfa6ceead690adf616d925bdc622b13",
+                "sha256:5b94b49521f6456670fdb30cd82a4eca9412788a93fa6dd6df72c94d5a8ff2d7"
+            ],
+            "version": "==7.0"
+        },
+        "cryptography": {
+            "hashes": [
+                "sha256:05a6052c6a9f17ff78ba78f8e6eb1d777d25db3b763343a1ae89a7a8670386dd",
+                "sha256:0eb83a24c650a36f68e31a6d0a70f7ad9c358fa2506dc7b683398b92e354a038",
+                "sha256:0ff4a3d6ea86aa0c9e06e92a9f986de7ee8231f36c4da1b31c61a7e692ef3378",
+                "sha256:1699f3e916981df32afdd014fb3164db28cdb61c757029f502cb0a8c29b2fdb3",
+                "sha256:1b1f136d74f411f587b07c076149c4436a169dc19532e587460d9ced24adcc13",
+                "sha256:21e63dd20f5e5455e8b34179ac43d95b3fb1ffa54d071fd2ed5d67da82cfe6dc",
+                "sha256:2454ada8209bbde97065453a6ca488884bbb263e623d35ba183821317a58b46f",
+                "sha256:3cdc5f7ca057b2214ce4569e01b0f368b3de9d8ee01887557755ccd1c15d9427",
+                "sha256:418e7a5ec02a7056d3a4f0c0e7ea81df374205f25f4720bb0e84189aa5fd2515",
+                "sha256:471a097076a7c4ab85561d7fa9a1239bd2ae1f9fd0047520f13d8b340bf3210b",
+                "sha256:5ecaf9e7db3ca582c6de6229525d35db8a4e59dc3e8a40a331674ed90e658cbf",
+                "sha256:63b064a074f8dc61be81449796e2c3f4e308b6eba04a241a5c9f2d05e882c681",
+                "sha256:6afe324dfe6074822ccd56d80420df750e19ac30a4e56c925746c735cf22ae8b",
+                "sha256:70596e90398574b77929cd87e1ac6e43edd0e29ba01e1365fed9c26bde295aa5",
+                "sha256:70c2b04e905d3f72e2ba12c58a590817128dfca08949173faa19a42c824efa0b",
+                "sha256:8908f1db90be48b060888e9c96a0dee9d842765ce9594ff6a23da61086116bb6",
+                "sha256:af12dfc9874ac27ebe57fc28c8df0e8afa11f2a1025566476b0d50cdb8884f70",
+                "sha256:b4fc04326b2d259ddd59ed8ea20405d2e695486ab4c5e1e49b025c484845206e",
+                "sha256:da5b5dda4aa0d5e2b758cc8dfc67f8d4212e88ea9caad5f61ba132f948bab859"
+            ],
+            "version": "==2.4.2"
+        },
+        "flask": {
+            "hashes": [
+                "sha256:2271c0070dbcb5275fad4a82e29f23ab92682dc45f9dfbc22c02ba9b9322ce48",
+                "sha256:a080b744b7e345ccfcbc77954861cb05b3c63786e93f2b3875e0913d44b43f05"
+            ],
+            "index": "pypi",
+            "version": "==1.0.2"
+        },
+        "gevent": {
+            "hashes": [
+                "sha256:1f277c5cf060b30313c5f9b91588f4c645e11839e14a63c83fcf6f24b1bc9b95",
+                "sha256:298a04a334fb5e3dcd6f89d063866a09155da56041bc94756da59db412cb45b1",
+                "sha256:30e9b2878d5b57c68a40b3a08d496bcdaefc79893948989bb9b9fab087b3f3c0",
+                "sha256:33533bc5c6522883e4437e901059fe5afa3ea74287eeea27a130494ff130e731",
+                "sha256:3f06f4802824c577272960df003a304ce95b3e82eea01dad2637cc8609c80e2c",
+                "sha256:419fd562e4b94b91b58cccb3bd3f17e1a11f6162fca6c591a7822bc8a68f023d",
+                "sha256:4ea938f44b882e02cca9583069d38eb5f257cc15a03e918980c307e7739b1038",
+                "sha256:51143a479965e3e634252a0f4a1ea07e5307cf8dc773ef6bf9dfe6741785fb4c",
+                "sha256:5bf9bd1dd4951552d9207af3168f420575e3049016b9c10fe0c96760ce3555b7",
+                "sha256:6004512833707a1877cc1a5aea90fd182f569e089bc9ab22a81d480dad018f1b",
+                "sha256:640b3b52121ab519e0980cb38b572df0d2bc76941103a697e828c13d76ac8836",
+                "sha256:6951655cc18b8371d823e81c700883debb0f633aae76f425dfeb240f76b95a67",
+                "sha256:71eeb8d9146e8131b65c3364bb760b097c21b7b9fdbec91bf120685a510f997a",
+                "sha256:7c899e5a6f94d6310352716740f05e41eb8c52d995f27fc01e90380913aa8f22",
+                "sha256:8465f84ba31aaf52a080837e9c5ddd592ab0a21dfda3212239ce1e1796f4d503",
+                "sha256:99de2e38dde8669dd30a8a1261bdb39caee6bd00a5f928d01dfdb85ab0502562",
+                "sha256:9fa4284b44bc42bef6e437488d000ae37499ccee0d239013465638504c4565b7",
+                "sha256:a1beea0443d3404c03e069d4c4d9fc13d8ec001771c77f9a23f01911a41f0e49",
+                "sha256:a66a26b78d90d7c4e9bf9efb2b2bd0af49234604ac52eaca03ea79ac411e3f6d",
+                "sha256:a94e197bd9667834f7bb6bd8dff1736fab68619d0f8cd78a9c1cebe3c4944677",
+                "sha256:ac0331d3a3289a3d16627742be9c8969f293740a31efdedcd9087dadd6b2da57",
+                "sha256:d26b57c50bf52fb38dadf3df5bbecd2236f49d7ac98f3cf32d6b8a2d25afc27f",
+                "sha256:fd23b27387d76410eb6a01ea13efc7d8b4b95974ba212c336e8b1d6ab45a9578"
+            ],
+            "index": "pypi",
+            "version": "==1.3.7"
+        },
+        "greenlet": {
+            "hashes": [
+                "sha256:000546ad01e6389e98626c1367be58efa613fa82a1be98b0c6fc24b563acc6d0",
+                "sha256:0d48200bc50cbf498716712129eef819b1729339e34c3ae71656964dac907c28",
+                "sha256:23d12eacffa9d0f290c0fe0c4e81ba6d5f3a5b7ac3c30a5eaf0126bf4deda5c8",
+                "sha256:37c9ba82bd82eb6a23c2e5acc03055c0e45697253b2393c9a50cef76a3985304",
+                "sha256:51503524dd6f152ab4ad1fbd168fc6c30b5795e8c70be4410a64940b3abb55c0",
+                "sha256:8041e2de00e745c0e05a502d6e6db310db7faa7c979b3a5877123548a4c0b214",
+                "sha256:81fcd96a275209ef117e9ec91f75c731fa18dcfd9ffaa1c0adbdaa3616a86043",
+                "sha256:853da4f9563d982e4121fed8c92eea1a4594a2299037b3034c3c898cb8e933d6",
+                "sha256:8b4572c334593d449113f9dc8d19b93b7b271bdbe90ba7509eb178923327b625",
+                "sha256:9416443e219356e3c31f1f918a91badf2e37acf297e2fa13d24d1cc2380f8fbc",
+                "sha256:9854f612e1b59ec66804931df5add3b2d5ef0067748ea29dc60f0efdcda9a638",
+                "sha256:99a26afdb82ea83a265137a398f570402aa1f2b5dfb4ac3300c026931817b163",
+                "sha256:a19bf883b3384957e4a4a13e6bd1ae3d85ae87f4beb5957e35b0be287f12f4e4",
+                "sha256:a9f145660588187ff835c55a7d2ddf6abfc570c2651c276d3d4be8a2766db490",
+                "sha256:ac57fcdcfb0b73bb3203b58a14501abb7e5ff9ea5e2edfa06bb03035f0cff248",
+                "sha256:bcb530089ff24f6458a81ac3fa699e8c00194208a724b644ecc68422e1111939",
+                "sha256:beeabe25c3b704f7d56b573f7d2ff88fc99f0138e43480cecdfcaa3b87fe4f87",
+                "sha256:d634a7ea1fc3380ff96f9e44d8d22f38418c1c381d5fac680b272d7d90883720",
+                "sha256:d97b0661e1aead761f0ded3b769044bb00ed5d33e1ec865e891a8b128bf7c656"
+            ],
+            "markers": "platform_python_implementation == 'CPython'",
+            "version": "==0.4.15"
+        },
+        "idna": {
+            "hashes": [
+                "sha256:c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407",
+                "sha256:ea8b7f6188e6fa117537c3df7da9fc686d485087abf6ac197f9c46432f7e4a3c"
+            ],
+            "version": "==2.8"
+        },
+        "itsdangerous": {
+            "hashes": [
+                "sha256:321b033d07f2a4136d3ec762eac9f16a10ccd60f53c0c91af90217ace7ba1f19",
+                "sha256:b12271b2047cb23eeb98c8b5622e2e5c5e9abd9784a153e9d8ef9cb4dd09d749"
+            ],
+            "version": "==1.1.0"
+        },
+        "jinja2": {
+            "hashes": [
+                "sha256:74c935a1b8bb9a3947c50a54766a969d4846290e1e788ea44c1392163723c3bd",
+                "sha256:f84be1bb0040caca4cea721fcbbbbd61f9be9464ca236387158b0feea01914a4"
+            ],
+            "version": "==2.10"
+        },
+        "markupsafe": {
+            "hashes": [
+                "sha256:048ef924c1623740e70204aa7143ec592504045ae4429b59c30054cb31e3c432",
+                "sha256:130f844e7f5bdd8e9f3f42e7102ef1d49b2e6fdf0d7526df3f87281a532d8c8b",
+                "sha256:19f637c2ac5ae9da8bfd98cef74d64b7e1bb8a63038a3505cd182c3fac5eb4d9",
+                "sha256:1b8a7a87ad1b92bd887568ce54b23565f3fd7018c4180136e1cf412b405a47af",
+                "sha256:1c25694ca680b6919de53a4bb3bdd0602beafc63ff001fea2f2fc16ec3a11834",
+                "sha256:1f19ef5d3908110e1e891deefb5586aae1b49a7440db952454b4e281b41620cd",
+                "sha256:1fa6058938190ebe8290e5cae6c351e14e7bb44505c4a7624555ce57fbbeba0d",
+                "sha256:31cbb1359e8c25f9f48e156e59e2eaad51cd5242c05ed18a8de6dbe85184e4b7",
+                "sha256:3e835d8841ae7863f64e40e19477f7eb398674da6a47f09871673742531e6f4b",
+                "sha256:4e97332c9ce444b0c2c38dd22ddc61c743eb208d916e4265a2a3b575bdccb1d3",
+                "sha256:525396ee324ee2da82919f2ee9c9e73b012f23e7640131dd1b53a90206a0f09c",
+                "sha256:52b07fbc32032c21ad4ab060fec137b76eb804c4b9a1c7c7dc562549306afad2",
+                "sha256:52ccb45e77a1085ec5461cde794e1aa037df79f473cbc69b974e73940655c8d7",
+                "sha256:5c3fbebd7de20ce93103cb3183b47671f2885307df4a17a0ad56a1dd51273d36",
+                "sha256:5e5851969aea17660e55f6a3be00037a25b96a9b44d2083651812c99d53b14d1",
+                "sha256:5edfa27b2d3eefa2210fb2f5d539fbed81722b49f083b2c6566455eb7422fd7e",
+                "sha256:7d263e5770efddf465a9e31b78362d84d015cc894ca2c131901a4445eaa61ee1",
+                "sha256:83381342bfc22b3c8c06f2dd93a505413888694302de25add756254beee8449c",
+                "sha256:857eebb2c1dc60e4219ec8e98dfa19553dae33608237e107db9c6078b1167856",
+                "sha256:98e439297f78fca3a6169fd330fbe88d78b3bb72f967ad9961bcac0d7fdd1550",
+                "sha256:bf54103892a83c64db58125b3f2a43df6d2cb2d28889f14c78519394feb41492",
+                "sha256:d9ac82be533394d341b41d78aca7ed0e0f4ba5a2231602e2f05aa87f25c51672",
+                "sha256:e982fe07ede9fada6ff6705af70514a52beb1b2c3d25d4e873e82114cf3c5401",
+                "sha256:edce2ea7f3dfc981c4ddc97add8a61381d9642dc3273737e756517cc03e84dd6",
+                "sha256:efdc45ef1afc238db84cb4963aa689c0408912a0239b0721cb172b4016eb31d6",
+                "sha256:f137c02498f8b935892d5c0172560d7ab54bc45039de8805075e19079c639a9c",
+                "sha256:f82e347a72f955b7017a39708a3667f106e6ad4d10b25f237396a7115d8ed5fd",
+                "sha256:fb7c206e01ad85ce57feeaaa0bf784b97fa3cad0d4a5737bc5295785f5c613a1"
+            ],
+            "version": "==1.1.0"
+        },
+        "pycparser": {
+            "hashes": [
+                "sha256:a988718abfad80b6b157acce7bf130a30876d27603738ac39f140993246b25b3"
+            ],
+            "version": "==2.19"
+        },
+        "pymysql": {
+            "hashes": [
+                "sha256:95f057328357e0e13a30e67857a8c694878b0175797a9a203ee7adbfb9b1ec5f",
+                "sha256:9ec760cbb251c158c19d6c88c17ca00a8632bac713890e465b2be01fdc30713f"
+            ],
+            "index": "pypi",
+            "version": "==0.9.2"
+        },
+        "redis": {
+            "hashes": [
+                "sha256:2100750629beff143b6a200a2ea8e719fcf26420adabb81402895e144c5083cf",
+                "sha256:8e0bdd2de02e829b6225b25646f9fb9daffea99a252610d040409a6738541f0a"
+            ],
+            "index": "pypi",
+            "version": "==3.0.1"
+        },
+        "six": {
+            "hashes": [
+                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
+                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+            ],
+            "version": "==1.12.0"
+        },
+        "werkzeug": {
+            "hashes": [
+                "sha256:c3fd7a7d41976d9f44db327260e263132466836cef6f91512889ed60ad26557c",
+                "sha256:d5da73735293558eb1651ee2fddc4d0dedcfa06538b8813a2e20011583c9e49b"
+            ],
+            "version": "==0.14.1"
+        }
+    },
+    "develop": {}
+}
diff --git a/flask/files/README.md b/flask/files/README.md
index 050262245..af20c67a5 100644
--- a/flask/files/README.md
+++ b/flask/files/README.md
@@ -1,4 +1,4 @@
-# Platform.sh Python 2.7 Flask minimal example
+# Platform.sh Python 3.7 Flask minimal example
 
 This project provides a starter kit for minimal Python 2.7 Flask projects hosted on Platform.sh. It is primarily an example, although could be used as the starting point for a real project.
 
diff --git a/flask/files/requirements.txt b/flask/files/requirements.txt
deleted file mode 100644
index 92e64ea85..000000000
--- a/flask/files/requirements.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-click==6.7
-Flask==0.12.2
-gevent==1.2.2
-greenlet==0.4.13
-itsdangerous==0.24
-Jinja2==2.10
-MarkupSafe==1.0
-PyMySQL==0.8.0
-redis==2.10.6
-Werkzeug==0.14.1
diff --git a/flask/files/server.py b/flask/files/server.py
index f2872634e..c567fd7a7 100644
--- a/flask/files/server.py
+++ b/flask/files/server.py
@@ -7,7 +7,7 @@
 
 import flask
 import flask.json
-import gevent.wsgi
+import gevent.pywsgi
 import pymysql
 import redis
 
@@ -64,12 +64,12 @@ def test_redis(instance):
         db=0,
     )
     key_name = "foo-%s" + str(uuid.uuid4())
-    value = "bar"
+    value = b"bar"
 
     r.set(key_name, "bar")
     assert value == r.get(key_name)
 
 
 if __name__ == "__main__":
-    http_server = gevent.wsgi.WSGIServer(('127.0.0.1', int(os.environ["PORT"])), app)
+    http_server = gevent.pywsgi.WSGIServer(('127.0.0.1', int(os.environ["PORT"])), app)
     http_server.serve_forever()