diff --git a/.changeset/warm-jobs-fold.md b/.changeset/warm-jobs-fold.md
new file mode 100644
index 00000000..823d6162
--- /dev/null
+++ b/.changeset/warm-jobs-fold.md
@@ -0,0 +1,5 @@
+---
+'@hono/prometheus': patch
+---
+
+fix: bump peer dependency
diff --git a/packages/prometheus/package.json b/packages/prometheus/package.json
index 45f1d496..46e2f4da 100644
--- a/packages/prometheus/package.json
+++ b/packages/prometheus/package.json
@@ -32,11 +32,11 @@
   },
   "homepage": "https://github.com/honojs/middleware",
   "peerDependencies": {
-    "hono": "^3.12.0",
+    "hono": ">=3.*",
     "prom-client": "^15.0.0"
   },
   "devDependencies": {
-    "hono": "^3.12.0",
+    "hono": "^4.2.7",
     "prom-client": "^15.0.0",
     "tsup": "^8.0.1",
     "vitest": "^1.0.4"
diff --git a/yarn.lock b/yarn.lock
index 175647e3..1e985dd2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1973,12 +1973,12 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@hono/prometheus@workspace:packages/prometheus"
   dependencies:
-    hono: "npm:^3.12.0"
+    hono: "npm:^4.2.7"
     prom-client: "npm:^15.0.0"
     tsup: "npm:^8.0.1"
     vitest: "npm:^1.0.4"
   peerDependencies:
-    hono: ^3.12.0
+    hono: ">=3.*"
     prom-client: ^15.0.0
   languageName: unknown
   linkType: soft
@@ -9547,13 +9547,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"hono@npm:^3.12.0":
-  version: 3.12.10
-  resolution: "hono@npm:3.12.10"
-  checksum: 43ad255e54bc5dd47154ad057565f41f2fda3dc866416f9a25fa2022e86c552b42109972f8c75101ed1da704c2b967d8bd474869db094878ab9438650379663c
-  languageName: node
-  linkType: hard
-
 "hono@npm:^4.0.1":
   version: 4.0.1
   resolution: "hono@npm:4.0.1"
@@ -9596,6 +9589,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"hono@npm:^4.2.7":
+  version: 4.2.7
+  resolution: "hono@npm:4.2.7"
+  checksum: 186d79ecedd4d9091eae4f2f32462f7e44530d1ea545de2cba594fd3f1e733f6f1d4367f12a6c85d188610ce1913bedadd1a83724b533700c0b12f5dcbb24f97
+  languageName: node
+  linkType: hard
+
 "hosted-git-info@npm:^2.1.4":
   version: 2.8.9
   resolution: "hosted-git-info@npm:2.8.9"