diff --git a/core/package.json b/core/package.json
index 8c1d702..d451f99 100644
--- a/core/package.json
+++ b/core/package.json
@@ -29,7 +29,7 @@
 	"devDependencies": {
 		"c8": "^10.1.2",
 		"fast-check": "^4.10.2",
-		"undici": "^6.20.1"
+		"undici": "^8.12.2"
 	},
 	"repository": {
 		"type": "git",
diff --git a/fetchindex/package.json b/fetchindex/package.json
index c0d8ef5..d279ab8 100644
--- a/fetchindex/package.json
+++ b/fetchindex/package.json
@@ -32,6 +32,6 @@
 	"devDependencies": {
 		"c8": "^10.1.2",
 		"luxon": "^3.5.0",
-		"undici": "^6.20.1"
+		"undici": "^8.12.2"
 	}
 }
diff --git a/opt/package.json b/opt/package.json
index 5d6de3d..1682204 100644
--- a/opt/package.json
+++ b/opt/package.json
@@ -32,6 +32,6 @@
 	"devDependencies": {
 		"c8": "^10.1.2",
 		"luxon": "^3.5.0",
-		"undici": "^6.20.1"
+		"undici": "^8.12.2"
 	}
 }