diff --git a/README.md b/README.md
index 4e7f7648..008c4e40 100644
--- a/README.md
+++ b/README.md
@@ -107,13 +107,14 @@ A white paper for the general toolbox in the context of drive simulation and con
 A white paper for the utilization of this framework within reinforcement learning is available at [IEEE-Xplore](https://ieeexplore.ieee.org/document/9241851) (preprint: [arxiv.org/abs/1910.09434](https://arxiv.org/abs/1910.09434)). Please use the following BibTeX entry for citing it:
 ```
 @article{9241851,  
-    doi={10.1109/TNNLS.2020.3029573}
-    author={A. {Traue} and G. {Book} and W. {Kirchgässner} and O. {Wallscheid}},  
-    journal={IEEE Transactions on Neural Networks and Learning Systems},   
-    title={Toward a Reinforcement Learning Environment Toolbox for Intelligent Electric Motor Control},   
-    year={2020},  volume={},  number={},      
-    pages={1-10},  
-}
+  author={Traue, Arne and Book, Gerrit and Kirchgässner, Wilhelm and Wallscheid, Oliver},
+  journal={IEEE Transactions on Neural Networks and Learning Systems}, 
+  title={Toward a Reinforcement Learning Environment Toolbox for Intelligent Electric Motor Control}, 
+  year={2022},
+  volume={33},
+  number={3},
+  pages={919-928},
+  doi={10.1109/TNNLS.2020.3029573}}
 ```
 
 ### Running Unit Tests with Pytest
diff --git a/requirements.txt b/requirements.txt
index 1d772b2a..36077ac8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 matplotlib>=3.1.2
 numpy>=1.16.4
 scipy>=1.4.1
-gym>=0.15.4
+gym<0.24.0,>=0.15.4
 pytest>=5.2.2
 pytest-cov