diff --git a/scripts/flatpak/com.orcaslicer.OrcaSlicer.yml b/scripts/flatpak/com.orcaslicer.OrcaSlicer.yml
index 94c98121ec..d081e2f997 100644
--- a/scripts/flatpak/com.orcaslicer.OrcaSlicer.yml
+++ b/scripts/flatpak/com.orcaslicer.OrcaSlicer.yml
@@ -276,6 +276,12 @@ modules:
         sha256: 27b72ba2d5ff3d0a9814ad40d4cb88f8dc89a35491c0866d952473f8f9416b77
         dest: external-packages/Draco
 
+      # Assimp 5.4.3
+      - type: file
+        url: https://github.com/assimp/assimp/archive/refs/tags/v5.4.3.tar.gz
+        sha256: 66dfbaee288f2bc43172440a55d0235dfc7bf885dda6435c038e8000e79582cb
+        dest: external-packages/Assimp
+
       # OpenSSL 1.1.1w (GNOME SDK has 3.x; OrcaSlicer requires 1.1.x)
       - type: file
         url: https://github.com/openssl/openssl/archive/OpenSSL_1_1_1w.tar.gz