diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index cf8dbe12e29cdf72ea5c1487faceea1514622de2..4091c87d432184251540b6e5ab851452d6308eec 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -81,14 +81,6 @@ build-coq.8.19.1:
     OPAM_PINS: "coq version 8.19.1"
     DENY_WARNINGS: "1"
 
-# The oldest version runs in MRs, without name mangling.
-build-coq.8.18.0:
-  <<: *template
-  <<: *branches_and_mr
-  variables:
-    OPAM_PINS: "coq version 8.18.0"
-    DENY_WARNINGS: "1"
-
 trigger-stdpp.dev:
   <<: *template
   variables:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4c0c6d22add870393edec500e851406175e65859..575bb8b5ec8cbc03222b1e06f919c1250d10bd44 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ lemma.
 
 ## Iris master
 
+Iris master supports Coq 8.19 and 8.20. Coq 8.18 is no longer supported.
+
 **Changes in `algebra`:**
 
 * Add lemmas `big_opS_gset_to_gmap` and `big_opS_gset_to_gmap_L`, which rewrite
diff --git a/README.md b/README.md
index 4d3f85b15d1a640635b310a4bc6be1e0fb0419ec..800750730b48fbf4d3543cc9bb7e70b3c4a8b703 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ Importing Iris has some side effects as the library sets some global options.
 
 This version is known to compile with:
 
- - Coq 8.18.0 / 8.19.1 / 8.20.0
+ - Coq 8.19.1 / 8.20.0
  - A development version of [std++](https://gitlab.mpi-sws.org/iris/stdpp)
 
 Generally we always aim to support the last two stable Coq releases. Support for