diff --git a/.appveyor.yml b/.appveyor.yml
index b79302b8..c893e7ad 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -27,7 +27,7 @@ environment:
         - {APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015, PY_VER: "27", PY_ARCH: "64"}
 
     OPENSSL_VERSION: "1_1_1h"
-    POSTGRES_VERSION: "11_4"
+    POSTGRES_VERSION: "11_10"
 
     PSYCOPG2_TESTDB: psycopg2_test
     PSYCOPG2_TESTDB_USER: postgres
diff --git a/scripts/appveyor.cache_rebuild b/scripts/appveyor.cache_rebuild
index 432d68ee..bc05bb1a 100644
--- a/scripts/appveyor.cache_rebuild
+++ b/scripts/appveyor.cache_rebuild
@@ -12,7 +12,7 @@ OpenSSL
         Version: 1.1.1h
 
 PostgreSQL
-        Version: 11.4
+        Version: 11.10
 
 
 NOTE: to zap the cache manually you can also use: