diff --git a/environment.yml b/environment.yml
index d95f1fae7e1e7aba651bd7bf5c39fefcc1e3ef93..d2b61237b7b29852a8e8459302f90caa901b107e 100644
--- a/environment.yml
+++ b/environment.yml
@@ -34,7 +34,7 @@ dependencies:
     - cycler==0.10.0
     - defusedxml==0.6.0
     - filelock==3.0.12
-    - flatland-rl==0.3.8
+    - flatland-rl==2.1.1
     - idna==2.8
     - importlib-metadata==0.19
     - importlib-resources==1.0.2