diff --git a/cache/run_redis.sh b/cache/run_redis.sh
index 344430d..8daf6d8 100755
--- a/cache/run_redis.sh
+++ b/cache/run_redis.sh
@@ -3,4 +3,11 @@
 set -e
 set -x
 
-../../redis/src/redis-server ./cache.conf
+if [ -f  ../../valkey/src/valkey-server ]; then
+    ../../valkey/src/valkey-server ./cache.conf
+elif [ -f ../../redis/src/redis-server ]; then
+    ../../redis/src/redis-server ./cache.conf
+else
+    echo "Warning: using system redis-server. Valkey-server or redis-server from source is recommended." >&2
+    /usr/bin/redis-server ./cache.conf
+fi
diff --git a/whowas/run_redis.sh b/whowas/run_redis.sh
index dec5745..8daf6d8 100755
--- a/whowas/run_redis.sh
+++ b/whowas/run_redis.sh
@@ -3,4 +3,11 @@
 set -e
 set -x
 
-../../redis/src/redis-server ./whowas.conf
+if [ -f  ../../valkey/src/valkey-server ]; then
+    ../../valkey/src/valkey-server ./cache.conf
+elif [ -f ../../redis/src/redis-server ]; then
+    ../../redis/src/redis-server ./cache.conf
+else
+    echo "Warning: using system redis-server. Valkey-server or redis-server from source is recommended." >&2
+    /usr/bin/redis-server ./cache.conf
+fi