diff --git a/docs/installation.rst b/docs/installation.rst
index 49bc9a8..411674a 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -8,7 +8,7 @@ Create and activate a conda environment:
 
   .. code:: bash
 
-    conda create --name pensa python=3.9 numpy==1.22 scipy>=1.2 pandas==1.4 matplotlib MDAnalysis==2.2 cython biotite -c conda-forge
+    conda create --name pensa python=3.9 numpy==1.22 scipy==1.9 pandas==1.4 matplotlib==3.5 MDAnalysis==2.2 cython biotite -c conda-forge -c conda-forge
     conda activate pensa
 
 If you want to use PENSA with Jupyter notebooks:
diff --git a/environment.yml b/environment.yml
index 08c2cb0..53d086f 100644
--- a/environment.yml
+++ b/environment.yml
@@ -4,10 +4,10 @@ channels:
   - defaults
 dependencies: 
   - python==3.9
-  - scipy>=1.2
+  - scipy==1.9
   - numpy==1.22
-  - pandas
-  - matplotlib
+  - pandas==1.4
+  - matplotlib==3.5
   - MDAnalysis==2.2
   - deeptime
   - biotite
diff --git a/setup.py b/setup.py
index c4b982b..936eb90 100644
--- a/setup.py
+++ b/setup.py
@@ -22,9 +22,9 @@
     zip_safe=False,
     install_requires=[
         'numpy==1.22', # density functions in MDAnalysis 2 use np.histogramdd() with keyword normed which is deprecated in numpy 1.21 and removed in numpy 1.24
-        'scipy>=1.2',
+        'scipy==1.9',
         'pandas==1.4',
-        'matplotlib',
+        'matplotlib==3.5',
         'deeptime',
         'MDAnalysis==2.2', # some features we use will likely be removed in MDA 3
         'biotite',