diff --git a/conf.env b/conf.env
index 93a5077..c226886 100644
--- a/conf.env
+++ b/conf.env
@@ -1,3 +1,3 @@
-NGINX_VERSION=1.20.0
+NGINX_VERSION=1.21.4
 NGX_GEOIP2_VERSION=3.3
 DOCKER_IMAGE=dcarrillo/nginx
diff --git a/tests/test.sh b/tests/test.sh
index bac01cd..cf8b8a8 100755
--- a/tests/test.sh
+++ b/tests/test.sh
@@ -34,7 +34,7 @@ _cleanup()
 _setup_crypto_stuff()
 {
     echo "Generating SSL files..."
-    openssl dhparam -out "$TMP_DIR"/dhparams.pem 512 > /dev/null 2>&1
+    openssl dhparam -out "$TMP_DIR"/dhparams.pem 1024 > /dev/null 2>&1
     openssl req -new -newkey rsa:4096 -days 365 -nodes -x509 \
         -subj "/C=ES/ST=Madrid/L=Madrid/O=dcarrillo/CN=localhost" \
         -keyout "$TMP_DIR"/cert.key -out "$TMP_DIR"/cert.pem > /dev/null 2>&1