diff --git a/environment.yml b/environment.yml
index 0a969c6..f9715d7 100644
--- a/environment.yml
+++ b/environment.yml
@@ -1,13 +1,12 @@
 name: quantumoptics2
 channels:
-  - defaults
-  - conda-forge
+ - conda-forge
 dependencies:
-  - python=3.7
-  - numpy
-  - matplotlib
-  - scipy
-  - plotly
-  - pip:
-    - cython
-    - qutip
\ No newline at end of file
+- python==3.7.3
+- pip==19.*
+- cython==0.29.8
+- numpy==1.16.4
+- scipy==1.2.1
+- matplotlib=3.0.3
+- qutip==4.4.0
+- imagemagick=7.0.8_49
\ No newline at end of file