diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index 35a149d..6ee8aab 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -22,10 +22,10 @@ jobs:
       - run: opam pin odoc 2.2.2 -y -n
         # crash with 2.4, see https://github.com/ocaml/odoc/issues/1066
       - name: Deps
-        run: opam install odig trace trace-tef trace-fuchsia ppx_trace
+        run: opam install odig trace trace-tef trace-fuchsia trace-subscriber ppx_trace
 
       - name: Build
-        run: opam exec -- odig odoc --cache-dir=_doc/ trace trace-tef trace-fuchsia ppx_trace
+        run: opam exec -- odig odoc --cache-dir=_doc/ trace trace-tef trace-fuchsia trace-subscriber ppx_trace
 
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v3
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ade416d..30e09cf 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -32,17 +32,17 @@ jobs:
           dune-cache: true
           allow-prerelease-opam: true
 
-      - run: opam install -t trace trace-tef trace-fuchsia --deps-only
+      - run: opam install -t trace trace-subscriber trace-tef trace-fuchsia --deps-only
       - run: opam install ppx_trace --deps-only # no tests
         if: matrix.ocaml-compiler != '4.08.x'
-      - run: opam exec -- dune build '@install' -p trace,trace-tef,trace-fuchsia
+      - run: opam exec -- dune build '@install' -p trace,trace-subscriber,trace-tef,trace-fuchsia
       - run: opam exec -- dune build '@install' -p ppx_trace
         if: matrix.ocaml-compiler != '4.08.x'
       - run: opam exec -- dune runtest -p trace
       - run: opam install trace
-      - run: opam exec -- dune runtest -p trace-tef,trace-fuchsia
+      - run: opam exec -- dune runtest -p trace-subscriber,trace-tef,trace-fuchsia
 
       # with depopts
       - run: opam install hmap
-      - run: opam exec -- dune build '@install' -p trace,trace-tef,trace-fuchsia
+      - run: opam exec -- dune build '@install' -p trace,trace-subscriber,trace-tef,trace-fuchsia