diff --git a/.appveyor.yml b/.appveyor.yml
index 3efac773..1761e99f 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -22,7 +22,7 @@ environment:
       - {PYVER: "36", PYTHON_ARCH: "32"}
       - {PYVER: "36", PYTHON_ARCH: "64"}
 
-    OPENSSL_VERSION: "1_0_2m"
+    OPENSSL_VERSION: "1_0_2n"
     POSTGRES_VERSION: "10_1"
 
     PSYCOPG2_TESTDB: psycopg2_test
diff --git a/NEWS b/NEWS
index 5095dc66..c4d65011 100644
--- a/NEWS
+++ b/NEWS
@@ -31,7 +31,7 @@ What's new in psycopg 2.7.4
 - Fixed `~cursor.rowcount` after `~cursor.executemany()` with :sql:`RETURNING`
   statements (:ticket:`633`).
 - Fixed compatibility problem with pypy3 (:ticket:`#649`).
-- Wheel packages compiled against PostgreSQL 10.1 libpq and OpenSSL 1.0.2m.
+- Wheel packages compiled against PostgreSQL 10.1 libpq and OpenSSL 1.0.2n.
 
 
 What's new in psycopg 2.7.3.2
diff --git a/scripts/appveyor.cache_rebuild b/scripts/appveyor.cache_rebuild
index da1b2be5..04825149 100644
--- a/scripts/appveyor.cache_rebuild
+++ b/scripts/appveyor.cache_rebuild
@@ -9,7 +9,7 @@ To invalidate the cache, update this file and check it into git.
 Currently used modules built in the cache:
 
 OpenSSL
-        Version: 1.0.2m
+        Version: 1.0.2n
 
 PostgreSQL
         Version: 10.1