diff --git a/packages/client-twitter/src/utils.ts b/packages/client-twitter/src/utils.ts
index 2fcbc6a9a7..526e2e12a1 100644
--- a/packages/client-twitter/src/utils.ts
+++ b/packages/client-twitter/src/utils.ts
@@ -165,16 +165,6 @@ export async function buildConversationThread(
     return thread;
 }
 
-export function getMediaType(attachment: Media) {
-    if (attachment.contentType?.startsWith("video")) {
-        return "video";
-    } else if (attachment.contentType?.startsWith("image")) {
-        return "image";
-    } else {
-        throw new Error(`Unsupported media type`);
-    }
-}
-
 export async function sendTweet(
     client: ClientBase,
     content: Content,
@@ -207,14 +197,14 @@ export async function sendTweet(
                         const mediaBuffer = Buffer.from(
                             await response.arrayBuffer()
                         );
-                        const mediaType = getMediaType(attachment);
+                        const mediaType = attachment.contentType;
                         return { data: mediaBuffer, mediaType };
                     } else if (fs.existsSync(attachment.url)) {
                         // Handle local file paths
                         const mediaBuffer = await fs.promises.readFile(
                             path.resolve(attachment.url)
                         );
-                        const mediaType = getMediaType(attachment);
+                        const mediaType = attachment.contentType;
                         return { data: mediaBuffer, mediaType };
                     } else {
                         throw new Error(
diff --git a/packages/plugin-image-generation/src/index.ts b/packages/plugin-image-generation/src/index.ts
index fd7f8b5246..9c65469919 100644
--- a/packages/plugin-image-generation/src/index.ts
+++ b/packages/plugin-image-generation/src/index.ts
@@ -207,7 +207,7 @@ const imageGeneration: Action = {
                                 source: "imageGeneration",
                                 description: "...", //caption.title,
                                 text: "...", //caption.description,
-                                contentType: "image",
+                                contentType: "image/png",
                             },
                         ],
                     },