diff --git a/extensions/Lily/SoundExpanded.js b/extensions/Lily/SoundExpanded.js
index cd3d151c53..7fd5d11e3e 100644
--- a/extensions/Lily/SoundExpanded.js
+++ b/extensions/Lily/SoundExpanded.js
@@ -32,7 +32,7 @@
                 defaultValue: 0,
               },
             },
-            extensions: ["colours_sound"],
+            extensions: ["colours_sounds"],
           },
           {
             opcode: "stopLooping",
@@ -43,7 +43,7 @@
                 type: Scratch.ArgumentType.SOUND,
               },
             },
-            extensions: ["colours_sound"],
+            extensions: ["colours_sounds"],
           },
           {
             opcode: "isLooping",
@@ -54,7 +54,7 @@
                 type: Scratch.ArgumentType.SOUND,
               },
             },
-            extensions: ["colours_sound"],
+            extensions: ["colours_sounds"],
           },
 
           "---",
@@ -68,7 +68,7 @@
                 type: Scratch.ArgumentType.SOUND,
               },
             },
-            extensions: ["colours_sound"],
+            extensions: ["colours_sounds"],
           },
           {
             opcode: "pauseSounds",
@@ -79,7 +79,7 @@
                 type: Scratch.ArgumentType.SOUND,
               },
             },
-            extensions: ["colours_sound"],
+            extensions: ["colours_sounds"],
           },
           {
             opcode: "resumeSounds",
@@ -90,7 +90,7 @@
                 type: Scratch.ArgumentType.SOUND,
               },
             },
-            extensions: ["colours_sound"],
+            extensions: ["colours_sounds"],
           },
 
           "---",
@@ -104,7 +104,7 @@
                 type: Scratch.ArgumentType.SOUND,
               },
             },
-            extensions: ["colours_sound"],
+            extensions: ["colours_sounds"],
           },
           {
             opcode: "attributeOfSound",
@@ -119,7 +119,7 @@
                 type: Scratch.ArgumentType.SOUND,
               },
             },
-            extensions: ["colours_sound"],
+            extensions: ["colours_sounds"],
           },
           {
             opcode: "getSoundEffect",
@@ -135,7 +135,7 @@
                 menu: "targets",
               },
             },
-            extensions: ["colours_sound"],
+            extensions: ["colours_sounds"],
           },
           "---",
           {
@@ -148,7 +148,7 @@
                 defaultValue: 100,
               },
             },
-            extensions: ["colours_sound"],
+            extensions: ["colours_sounds"],
           },
           {
             opcode: "changeProjectVolume",
@@ -160,13 +160,13 @@
                 defaultValue: -10,
               },
             },
-            extensions: ["colours_sound"],
+            extensions: ["colours_sounds"],
           },
           {
             opcode: "getProjectVolume",
             blockType: Scratch.BlockType.REPORTER,
             text: "project volume",
-            extensions: ["colours_sound"],
+            extensions: ["colours_sounds"],
           },
         ],
         menus: {