diff --git a/.circleci/config.yml b/.circleci/config.yml
index 97b13267c..a3ef3a07e 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -291,7 +291,8 @@ jobs:
             # Note: we don't want to execute the example notebooks in this step since
             #   this happens in a separate readthedocs job anyway.
             NB_EXECUTION_MODE: "off"
-          command: pushd docs/ && make clean && make doctest && popd
+          command: pip install gym==0.21.0 && 
+            pushd docs/ && make clean && make doctest && popd
 
   type:
     executor: static-analysis-medium