diff --git a/.github/workflows/test_pytest.yaml b/.github/workflows/test_pytest.yaml
index 65fbf269e..8bb5bfc03 100644
--- a/.github/workflows/test_pytest.yaml
+++ b/.github/workflows/test_pytest.yaml
@@ -12,7 +12,7 @@ jobs:
           - macos-latest
           - windows-latest
         python-version:
-          - 3.8
+          - 3.7
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
diff --git a/docs/conf.py b/docs/conf.py
index 95f4e0ec8..614f78a0a 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -24,7 +24,7 @@
 author = "Giovani Hidalgo Ceotto"
 
 # The full version, including alpha/beta/rc tags
-release = "0.12.0"
+release = "0.12.1"
 
 
 # -- General configuration ---------------------------------------------------
diff --git a/docs/user/installation.rst b/docs/user/installation.rst
index f5f22f824..f80f6e2a1 100644
--- a/docs/user/installation.rst
+++ b/docs/user/installation.rst
@@ -19,7 +19,7 @@ If you want to choose a specific version to guarantee compatibility, you may ins
 
 .. code-block:: shell
 
-    pip install rocketpy==0.12.0
+    pip install rocketpy==0.12.1
 
 
 Optional Installation Method: ``conda``
diff --git a/rocketpy/EnvironmentAnalysis.py b/rocketpy/EnvironmentAnalysis.py
index 2ae57a231..4d24043c0 100644
--- a/rocketpy/EnvironmentAnalysis.py
+++ b/rocketpy/EnvironmentAnalysis.py
@@ -2040,7 +2040,7 @@ def init():
             ax.set_ylabel("Probability")
             ax.set_title("Wind Gust Distribution")
             # ax.grid(True)
-            return ln, *bar_container.patches, tx
+            return (ln, *bar_container.patches, tx)
 
         # Define function which sets each animation frame
         def update(frame):
@@ -2056,7 +2056,7 @@ def update(frame):
             ln.set_data(xdata, ydata)
             # Update hour text
             tx.set_text(f"{float(frame[0]):05.2f}".replace(".", ":"))
-            return ln, *bar_container.patches, tx
+            return (ln, *bar_container.patches, tx)
 
         for frame in wind_gusts_at_given_hour.items():
             update(frame)
@@ -2243,7 +2243,7 @@ def init():
                     label="SAcup wind speed constraints",
                 )  # Plot SAcup wind speed constraints
 
-            return ln, *bar_container.patches, tx
+            return (ln, *bar_container.patches, tx)
 
         # Define function which sets each animation frame
         def update(frame):
@@ -2261,7 +2261,7 @@ def update(frame):
             ln.set_data(xdata, ydata)
             # Update hour text
             tx.set_text(f"{float(frame[0]):05.2f}".replace(".", ":"))
-            return ln, *bar_container.patches, tx
+            return (ln, *bar_container.patches, tx)
 
         for frame in surface_wind_speeds_at_given_hour.items():
             update(frame)
diff --git a/rocketpy/__init__.py b/rocketpy/__init__.py
index ecca8a231..7aa6f0454 100644
--- a/rocketpy/__init__.py
+++ b/rocketpy/__init__.py
@@ -16,7 +16,7 @@
 __copyright__ = "Copyright 20XX, Projeto Jupiter"
 __credits__ = ["Matheus Marques Araujo", "Rodrigo Schmitt", "Guilherme Tavares"]
 __license__ = "MIT"
-__version__ = "0.12.0"
+__version__ = "0.12.1"
 __maintainer__ = "Giovani Hidalgo Ceotto"
 __email__ = "ghceotto@gmail.com"
 __status__ = "Production"
diff --git a/setup.py b/setup.py
index 767c8d76b..6237e49a4 100644
--- a/setup.py
+++ b/setup.py
@@ -5,13 +5,14 @@
 
 setuptools.setup(
     name="rocketpy",
-    version="0.12.0",
+    version="0.12.1",
     install_requires=[
         "numpy>=1.0",
         "scipy>=1.0",
         "matplotlib>=3.0",
-        "netCDF4>=1.4",
+        "netCDF4>=1.4,<1.6",
         "windrose>=1.6.8",
+        "ipywidgets>=7.6.3",
         "requests",
         "pytz",
         "timezonefinder",