diff --git a/environment.yml b/environment.yml
index fcb1e12..d873985 100644
--- a/environment.yml
+++ b/environment.yml
@@ -13,6 +13,6 @@ dependencies:
   - mpi4py<4
   - mshr
   - pip:
-    - festim==1.3
+    - festim~=1.3
     - pyparsing
     - h-transport-materials==0.16