diff --git a/.github/workflows/publish-npm.yml b/.github/workflows/publish-npm.yml
index a8db8e7..0ae7814 100644
--- a/.github/workflows/publish-npm.yml
+++ b/.github/workflows/publish-npm.yml
@@ -58,7 +58,7 @@ jobs:
           # - windows-latest
           - macOS-latest
         ocaml-compiler:
-          - 5.1.x
+          - 5.2.x
     runs-on: ${{ matrix.os }}
     steps:
       - name: Setup OpenSSL (macOS)
diff --git a/docker/Dockerfile b/docker/Dockerfile
index d66e7eb..0ac0340 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -12,7 +12,7 @@ RUN ./configure --prefix=/usr --libdir=/lib --static && \
   make install pkgconfigdir="/usr/lib/pkgconfig"
 
 
-FROM ocaml/opam:alpine-ocaml-5.1-flambda
+FROM ocaml/opam:alpine-ocaml-5.2-flambda
 
 RUN sudo apk add --no-cache --update \
   bash make cmake curl perl-utils git patch gcc g++ \