diff --git a/src/lib/config.ml b/src/lib/config.ml
index d78a6de2..e0e8ea7d 100644
--- a/src/lib/config.ml
+++ b/src/lib/config.ml
@@ -212,9 +212,9 @@ let cmdliner =
     $ take_n_last_versions
     $ Ssh.cmdliner)
 
-(* odoc pinned to tag 2.2.2 *)
+(* odoc pinned to tag 2.3.1 *)
 let odoc _ =
-  "https://github.com/ocaml/odoc.git#34a48e2543f6ea5716e9ee922954fa0917561dd7"
+  "https://github.com/ocaml/odoc.git#7ca4890b94d9c36732e3eb69fcf2859f95975dfb"
 
 let pool _ = "linux-x86_64"
 let jobs t = t.jobs