diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 17ec4b014040665da2e801bbb8a3761281c87c1b..3af2f665c8a1cc88da41125c4ab7709fa50bf537 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -36,10 +36,10 @@ build-coq.8.10.1:
   tags:
   - fp-timing
 
-build-coq.8.9.0:
+build-coq.8.9.1:
   <<: *template
   variables:
-    OPAM_PINS: "coq version 8.9.0"
+    OPAM_PINS: "coq version 8.9.1"
 
 build-iris.dev:
   <<: *template
diff --git a/README.md b/README.md
index 30907982c758dc3029a5a072989d1b59fd5cf66d..757e71203b286d0c5624391a358c78e47e99e392 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ This is the Coq development accompanying RBrlx.
 
 This version is known to compile with:
 
- - Coq 8.9.0 / 8.10.1
+ - Coq 8.9.1 / 8.10.1
  - A development version of [GPFSL].
 
 The easiest way to install the correct versions of the dependencies is through