diff --git a/lib/commands.json b/lib/commands.json
index 06f1b02..36dccb9 100644
--- a/lib/commands.json
+++ b/lib/commands.json
@@ -2005,6 +2005,16 @@
     "keyStop": -1,
     "step": 1
   },
+  "sdiffcard": {
+    "arity": -3,
+    "flags": [
+      "readonly",
+      "movablekeys"
+    ],
+    "keyStart": 0,
+    "keyStop": 0,
+    "step": 0
+  },
   "sdiffstore": {
     "arity": -3,
     "flags": [
@@ -2301,6 +2311,16 @@
     "keyStop": -1,
     "step": 1
   },
+  "sunioncard": {
+    "arity": -3,
+    "flags": [
+      "readonly",
+      "movablekeys"
+    ],
+    "keyStart": 0,
+    "keyStop": 0,
+    "step": 0
+  },
   "sunionstore": {
     "arity": -3,
     "flags": [
diff --git a/lib/index.ts b/lib/index.ts
index 97ad893..81ae860 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -122,7 +122,9 @@ export function getKeyIndexes(
     case "bzmpop":
       keys.push(...takeDynamicKeys(args, 1));
       break;
+    case "sdiffcard":
     case "sintercard":
+    case "sunioncard":
     case "lmpop":
     case "zunion":
     case "zinter":
diff --git a/test/index.js b/test/index.js
index 38a36f8..f250815 100644
--- a/test/index.js
+++ b/test/index.js
@@ -215,6 +215,29 @@ describe('redis-commands', () => {
         expect(index('zintercard', ['2', 'key1', 'key2'])).to.eql([1, 2])
       })
 
+      it('handles sdiffcard', () => {
+        expect(index('sdiffcard', ['1', 'key1'])).to.eql([1])
+        expect(index('sdiffcard', [2, 'key1', 'key2'])).to.eql([1, 2])
+        expect(
+          index('sdiffcard', ['2', 'key1', 'key2', 'LIMIT', '1'])
+        ).to.eql([1, 2])
+      })
+
+      it('handles sunioncard', () => {
+        expect(index('sunioncard', ['1', 'key1'])).to.eql([1])
+        expect(index('sunioncard', [2, 'key1', 'key2'])).to.eql([1, 2])
+        expect(
+          index('sunioncard', [
+            '2',
+            'key1',
+            'key2',
+            'APPROX',
+            'LIMIT',
+            '1'
+          ])
+        ).to.eql([1, 2])
+      })
+
       it('handles lmpop', () => {
         expect(
           index('lmpop', ['2', 'key1', 'key2', 'left', 'count', 10])