diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 0d4cd71..1c25002 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -65,7 +65,7 @@ jobs:
           channel-priority: true
 
       - name: install build deps
-        run: mamba install scip gurobi gcovr
+        run: mamba install scip=9.1.0 gurobi gcovr
 
       - name: add gurobi license
         shell: bash
diff --git a/README.md b/README.md
index b8bff13..d424317 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ ilpy links against SCIP, so you must have SCIP installed in your environment.
 (You can install via conda)
 
 ```bash
-conda install scip
+conda install scip==9.1.0
 ```
 
 Then clone the repo and install in editable mode.