diff --git a/assets/defold-log.json b/assets/defold-log.json
index 05a82ca1..0844b567 100644
--- a/assets/defold-log.json
+++ b/assets/defold-log.json
@@ -2,8 +2,8 @@
   "author": "Insality",
   "description": "Context logger with performance metrics for Defold",
   "images": {
-    "hero": "defold-log-hero.jpg",
-    "thumb": "defold-log-thumb.jpg"
+    "hero": "defold-log-hero.png",
+    "thumb": "defold-log-thumb.png"
   },
   "library_url": "https://github.com/Insality/defold-log/archive/refs/tags/1.zip",
   "license": "MIT",
diff --git a/assets/pcg-random.json b/assets/pcg-random.json
index 6cf97930..0c48543a 100644
--- a/assets/pcg-random.json
+++ b/assets/pcg-random.json
@@ -4,7 +4,7 @@
   "forum_url": "",
   "images": {
     "hero": "pcg-random-hero.jpg",
-    "thumb": "pcg-random-thumb.jpg"
+    "thumb": "pcg-random-thumb.png"
   },
   "library_url": "https://github.com/Lerg/extension-pcgrandom/archive/refs/heads/main.zip",
   "license": "MIT",