diff --git a/.circleci/config.yml b/.circleci/config.yml
index a0165aea7a..a7b60f2a47 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -180,6 +180,8 @@ commands:
       - restore_cache:
           keys:
           - python-deps-v3-{{ arch }}-<< parameters.py-version >>-{{ checksum "requirements/requirements-ci.txt" }}
+# hack: solving a inter-PR cache problem
+          - python-deps-v3-{{ arch }}-<< parameters.py-version >>-2uPiIM_pNv5neMjXtHsw_aV6BQGcFOekCBcy7TJEkhI=
           - python-deps-v3-{{ arch }}-<< parameters.py-version >>-
       - run:
           name: Creating virtualenv
diff --git a/requirements/requirements-ci.txt b/requirements/requirements-ci.txt
index 984700a76f..0f78a1a0a5 100644
--- a/requirements/requirements-ci.txt
+++ b/requirements/requirements-ci.txt
@@ -141,7 +141,7 @@ python-magic==0.4.15      # via s3cmd
 pytoml==0.1.20
 pytz==2019.1
 pyyaml==5.1.1
-raiden-contracts==0.30.0
+raiden-contracts==0.31.0
 raiden-webui==0.9.2
 readme-renderer==24.0
 releases==1.6.1
@@ -187,4 +187,4 @@ zipp==0.5.1
 zope.interface==4.6.0
 
 # The following packages are considered to be unsafe in a requirements file:
-# setuptools==41.0.1        # via ipython, jsonschema, pyhamcrest, pyinstaller, sphinx, zope.interface
+# setuptools==41.1.0        # via ipython, jsonschema, pyhamcrest, pyinstaller, sphinx, zope.interface
diff --git a/requirements/requirements-dev.txt b/requirements/requirements-dev.txt
index 30c4c172ca..e9fc3cfc4e 100644
--- a/requirements/requirements-dev.txt
+++ b/requirements/requirements-dev.txt
@@ -135,7 +135,7 @@ python-dateutil==2.8.0    # via pysaml2
 pytoml==0.1.20
 pytz==2019.1
 pyyaml==5.1.1             # via matrix-synapse
-raiden-contracts==0.30.0
+raiden-contracts==0.31.0
 raiden-webui==0.9.2
 readme-renderer==24.0
 releases==1.6.1
@@ -180,4 +180,4 @@ zipp==0.5.1               # via importlib-metadata
 zope.interface==4.6.0     # via twisted
 
 # The following packages are considered to be unsafe in a requirements file:
-# setuptools==41.0.1        # via ipython, jsonschema, pyhamcrest, sphinx, zope.interface
+# setuptools==41.1.0        # via ipython, jsonschema, pyhamcrest, sphinx, zope.interface
diff --git a/requirements/requirements.txt b/requirements/requirements.txt
index 5290f2ecb4..55081af62d 100644
--- a/requirements/requirements.txt
+++ b/requirements/requirements.txt
@@ -59,7 +59,7 @@ pycryptodome==3.8.2       # via eth-hash, eth-keyfile
 pysha3==1.0.2
 pytoml==0.1.20
 pytz==2019.1              # via flask-restful
-raiden-contracts==0.30.0
+raiden-contracts==0.31.0
 raiden-webui==0.9.2
 requests==2.22.0
 rlp==1.1.0                # via eth-rlp, raiden-contracts
@@ -79,4 +79,4 @@ websockets==6.0           # via web3
 werkzeug==0.15.4          # via flask
 
 # The following packages are considered to be unsafe in a requirements file:
-# setuptools==41.0.1        # via ipython
+# setuptools==41.1.0        # via ipython