diff --git a/src/commands/set.js b/src/commands/set.js
index 78c50824..5cc1ab31 100644
--- a/src/commands/set.js
+++ b/src/commands/set.js
@@ -10,11 +10,14 @@ function createGroupedArray(arr, groupSize) {
 }
 
 export function set(key, value, ...options) {
-  const nx = options.indexOf('NX') !== -1
-  const xx = options.indexOf('XX') !== -1
-  const get = options.indexOf('GET') !== -1
+  const normalizedOptions = options.map(option =>
+    typeof option === 'string' ? option.toUpperCase() : option
+  )
+  const nx = normalizedOptions.indexOf('NX') !== -1
+  const xx = normalizedOptions.indexOf('XX') !== -1
+  const get = normalizedOptions.indexOf('GET') !== -1
 
-  const filteredOptions = options.filter(
+  const filteredOptions = normalizedOptions.filter(
     option => option !== 'NX' && option !== 'XX'
   )
 
diff --git a/test/integration/commands/set.js b/test/integration/commands/set.js
index d21cd397..586ddc3a 100644
--- a/test/integration/commands/set.js
+++ b/test/integration/commands/set.js
@@ -40,6 +40,17 @@ runTwinSuite('set', (command, equals) => {
       redis.disconnect()
     })
 
+    it('should handle expiration options case-insensitively', async () => {
+      const redis = new Redis()
+
+      expect(equals(await redis[command]('foo', 'bar', 'ex', 10), 'OK')).toBe(
+        true
+      )
+      expect(await redis.get('foo')).toBe('bar')
+      expect(await redis.ttl('foo')).toBeGreaterThanOrEqual(1)
+      redis.disconnect()
+    })
+
     it('should set value and expire with PX', async () => {
       const redis = new Redis()