diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 5a415e13..422d21f6 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -19,6 +19,7 @@ jobs:
     - run: opam pin -n .
     - run: opam install tiny_httpd
     - run: opam install tiny_httpd_camlzip
+    - run: opam depext -yt tiny_httpd tiny_httpd_camlzip
     - run: opam reinstall -t tiny_httpd
     - run: opam reinstall -t tiny_httpd_camlzip
     - run: opam remove tiny_httpd tiny_httpd_camlzip