diff --git a/bin/returnTypes.js b/bin/returnTypes.js
index cdbe6147..346b6610 100644
--- a/bin/returnTypes.js
+++ b/bin/returnTypes.js
@@ -317,7 +317,7 @@ module.exports = {
   zrevrange: "string[]",
   zrevrangebyscore: "string[]",
   zrevrank: "number | null",
-  zscore: "string",
+  zscore: "string | null",
   zunion: "string[]",
   zmscore: "(string | null)[]",
   zunionstore: "number",
diff --git a/lib/utils/RedisCommander.ts b/lib/utils/RedisCommander.ts
index 681710b8..49388d8e 100644
--- a/lib/utils/RedisCommander.ts
+++ b/lib/utils/RedisCommander.ts
@@ -13854,13 +13854,13 @@ interface RedisCommander<Context extends ClientContext = { type: "default" }> {
   zscore(
     key: RedisKey,
     member: string | Buffer | number,
-    callback?: Callback<string>
-  ): Result<string, Context>;
+    callback?: Callback<string | null>
+  ): Result<string | null, Context>;
   zscoreBuffer(
     key: RedisKey,
     member: string | Buffer | number,
-    callback?: Callback<Buffer>
-  ): Result<Buffer, Context>;
+    callback?: Callback<Buffer | null>
+  ): Result<Buffer | null, Context>;
 
   /**
    * Add multiple sorted sets
diff --git a/test/typing/commands.test-d.ts b/test/typing/commands.test-d.ts
index 4e5fcdb6..ad4a5e96 100644
--- a/test/typing/commands.test-d.ts
+++ b/test/typing/commands.test-d.ts
@@ -88,6 +88,10 @@ expectType<Promise<number>>(redis.zadd("key", "CH", 1, "member"));
 expectType<Promise<string | null>>(redis.zrandmember("key"));
 expectType<Promise<string[]>>(redis.zrandmember("key", 20));
 
+// ZSCORE
+expectType<Promise<string | null>>(redis.zscore("key", "member"));
+expectType<Promise<Buffer | null>>(redis.zscoreBuffer("key", "member"));
+
 // GETRANGE
 expectType<Promise<Buffer>>(redis.getrangeBuffer("foo", 0, 1));