diff --git a/linux-audio/fluidsynth2.json b/linux-audio/fluidsynth2.json
index 99d1a21f..7694b6d8 100644
--- a/linux-audio/fluidsynth2.json
+++ b/linux-audio/fluidsynth2.json
@@ -12,8 +12,14 @@
     "sources": [
         {
             "type": "archive",
-            "url": "https://github.com/FluidSynth/fluidsynth/archive/refs/tags/v2.4.6.tar.gz",
-            "sha256": "a6be90fd4842b9e7246500597180af5cf213c11bfa3998a3236dd8ff47961ea8"
+            "url": "https://github.com/FluidSynth/fluidsynth/archive/v2.5.6.tar.gz",
+            "sha256": "0825f024c9cf7a18073739b83612d46542ecbfb349ae9147a1e9f08e2d524407"
+        },
+        {
+            "type": "git",
+            "url": "https://github.com/kthohr/gcem.git",
+            "commit": "012ae73c6d0a2cb09ffe86475f5c6fba3926e200",
+            "dest": "gcem"
         }
     ]
 }