diff --git a/bun.lock b/bun.lock
index 3b57674..cc66d02 100644
--- a/bun.lock
+++ b/bun.lock
@@ -7,7 +7,7 @@
       "dependencies": {
         "@actions/core": "^3.0.1",
         "@actions/github": "^9.1.1",
-        "diff": "^8.0.4",
+        "diff": "^9.0.0",
       },
       "devDependencies": {
         "@biomejs/biome": "2.4.13",
@@ -72,7 +72,7 @@
 
     "before-after-hook": ["before-after-hook@4.0.0", "", {}, "sha512-q6tR3RPqIB1pMiTRMFcZwuG5T8vwp+vUvEG0vuI6B+Rikh5BfPp2fQ82c925FOs+b0lcFQ8CFrL+KbilfZFhOQ=="],
 
-    "diff": ["diff@8.0.4", "", {}, "sha512-DPi0FmjiSU5EvQV0++GFDOJ9ASQUVFh5kD+OzOnYdi7n3Wpm9hWWGfB/O2blfHcMVTL5WkQXSnRiK9makhrcnw=="],
+    "diff": ["diff@9.0.0", "", {}, "sha512-svtcdpS8CgJyqAjEQIXdb3OjhFVVYjzGAPO8WGCmRbrml64SPw/jJD4GoE98aR7r25A0XcgrK3F02yw9R/vhQw=="],
 
     "fast-content-type-parse": ["fast-content-type-parse@3.0.0", "", {}, "sha512-ZvLdcY8P+N8mGQJahJV5G4U88CSvT1rP8ApL6uETe88MBXrBHAkZlSEySdUlyztF7ccb+Znos3TFqaepHxdhBg=="],
 
diff --git a/package.json b/package.json
index 446e076..580a1b8 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
 	"dependencies": {
 		"@actions/core": "^3.0.1",
 		"@actions/github": "^9.1.1",
-		"diff": "^8.0.4"
+		"diff": "^9.0.0"
 	},
 	"description": "GitHub Action that compares two files, add tolerances, send notifications, etc",
 	"devDependencies": {