diff --git a/package-lock.json b/package-lock.json
index 2b057fc7..516c867d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -41,7 +41,7 @@
         "rollup-plugin-istanbul": "^5.0.0",
         "sass": "^1.80.0",
         "sinon": "^19.0.0",
-        "sinon-chai": "^3.7.0"
+        "sinon-chai": "^4.0.0"
       }
     },
     "node_modules/@aashutoshrathi/word-wrap": {
@@ -7463,12 +7463,13 @@
       }
     },
     "node_modules/sinon-chai": {
-      "version": "3.7.0",
-      "resolved": "https://registry.npmjs.org/sinon-chai/-/sinon-chai-3.7.0.tgz",
-      "integrity": "sha512-mf5NURdUaSdnatJx3uhoBOrY9dtL19fiOtAdT1Azxg3+lNJFiuN0uzaU3xX1LeAfL17kHQhTAJgpsfhbMJMY2g==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/sinon-chai/-/sinon-chai-4.0.0.tgz",
+      "integrity": "sha512-cWqO7O2I4XfJDWyWElAQ9D/dtdh5Mo0RHndsfiiYyjWnlPzBJdIvjCVURO4EjyYaC3BjV+ISNXCfTXPXTEIEWA==",
       "dev": true,
+      "license": "(BSD-2-Clause OR WTFPL)",
       "peerDependencies": {
-        "chai": "^4.0.0",
+        "chai": "^5.0.0",
         "sinon": ">=4.0.0"
       }
     },
diff --git a/package.json b/package.json
index 80262d9c..a91e90db 100644
--- a/package.json
+++ b/package.json
@@ -66,6 +66,6 @@
     "rollup-plugin-istanbul": "^5.0.0",
     "sass": "^1.80.0",
     "sinon": "^19.0.0",
-    "sinon-chai": "^3.7.0"
+    "sinon-chai": "^4.0.0"
   }
 }