diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 2be9b7f7..5d236d82 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -57,7 +57,7 @@ jobs:
 
     - name: Add solver to environment
       run: |
-        echo -e "  - glpk\n  - ipopt<3.13.3" >> envs/environment.yaml
+        echo -e "- glpk\n- ipopt" >> envs/environment.yaml
 
     - name: Setup Mambaforge
       uses: conda-incubator/setup-miniconda@v2