diff --git a/.travis.yml b/.travis.yml
index 0c32293..186bed2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,8 +10,9 @@ script:
                 Conda.add("numpy");
                 Conda.add("scipy==0.17.1");
                 ENV["PYTHONHOME"] = "";
+                Conda.add("python=3.6");
                 Pkg.build("PyCall");'
-    - ~/.julia/conda/3/bin/pip install 'gym[atari]'
+    - ~/.julia/conda/3/bin/pip install 'gym[atari]==0.11.0'
     - julia -e 'using Pkg;
                 Pkg.activate(".");
                 Pkg.test(coverage = true);'
diff --git a/README.md b/README.md
index 769975a..9c7e4d6 100644
--- a/README.md
+++ b/README.md
@@ -29,9 +29,11 @@ end
 then install gym from the command line:
 
 ```
-~/.julia/conda/3/bin/pip install 'gym[all]'
+~/.julia/conda/3/bin/pip install 'gym[all]==0.11.0'
 ```
 
+We only test with gym v0.11.0 at this moment.
+
 ### Install OpenAIGym.jl
 
 ```julia