diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 6b965a565..fbee22168 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -34,7 +34,7 @@ jobs:
       
       - name: Build doc
         run: | 
-            odoc --version
+            opam exec -- odoc --version
             opam exec -- dune build @doc --verbose 2>&1
             ls _build/default/_doc/_html/owl/Owl_dense_matrix
             cp docs/*.js  _build/default/_doc/_html/