diff --git a/envs/environment.yaml b/envs/environment.yaml
index 0c881720..00b7830a 100644
--- a/envs/environment.yaml
+++ b/envs/environment.yaml
@@ -37,6 +37,7 @@ dependencies:
   - pyomo
   - matplotlib
   - proj
+  - fiona <= 1.18.20  # Till issue https://github.com/Toblerity/Fiona/issues/1085 is not solved
 
   # Keep in conda environment when calling ipython
   - ipython