diff --git a/packages/fetch-impl/package.json b/packages/fetch-impl/package.json
index 34c07e0e924..ff1cdb9c0d5 100644
--- a/packages/fetch-impl/package.json
+++ b/packages/fetch-impl/package.json
@@ -7,6 +7,6 @@
     },
     "devDependencies": {
         "tinybench": "^2.6.0",
-        "undici": "^6.19.2"
+        "undici": "^6.19.3"
     }
 }
diff --git a/packages/rpc-transport-http/package.json b/packages/rpc-transport-http/package.json
index 0f4b82e878f..f8a0d4d1ec0 100644
--- a/packages/rpc-transport-http/package.json
+++ b/packages/rpc-transport-http/package.json
@@ -70,7 +70,7 @@
     },
     "devDependencies": {
         "tinybench": "^2.8.0",
-        "undici": "^6.19.2",
+        "undici": "^6.19.3",
         "zx": "^8.1.4"
     },
     "peerDependencies": {
diff --git a/packages/test-config/package.json b/packages/test-config/package.json
index 5e78c5c232a..915c09dcf46 100644
--- a/packages/test-config/package.json
+++ b/packages/test-config/package.json
@@ -8,12 +8,12 @@
     ],
     "peerDependencies": {
         "jest-dev-server": "^10.0.0",
-        "undici": "^6.19.2",
+        "undici": "^6.19.3",
         "whatwg-fetch": "^3.6.20"
     },
     "devDependencies": {
         "@jest/types": "^29.6.3",
-        "undici": "^6.19.2",
+        "undici": "^6.19.3",
         "whatwg-fetch": "^3.6.20"
     }
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index b0d9bdd0ab8..040b24de9f0 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -427,8 +427,8 @@ importers:
         specifier: ^2.6.0
         version: 2.8.0
       undici:
-        specifier: ^6.19.2
-        version: 6.19.2
+        specifier: ^6.19.3
+        version: 6.19.3
 
   packages/functional:
     dependencies:
@@ -1092,8 +1092,8 @@ importers:
         specifier: ^2.8.0
         version: 2.8.0
       undici:
-        specifier: ^6.19.2
-        version: 6.19.2
+        specifier: ^6.19.3
+        version: 6.19.3
       zx:
         specifier: ^8.1.4
         version: 8.1.4
@@ -1197,8 +1197,8 @@ importers:
         specifier: ^29.6.3
         version: 29.6.3
       undici:
-        specifier: ^6.19.2
-        version: 6.19.2
+        specifier: ^6.19.3
+        version: 6.19.3
       whatwg-fetch:
         specifier: ^3.6.20
         version: 3.6.20
@@ -8519,8 +8519,8 @@ packages:
   undici-types@6.19.3:
     resolution: {integrity: sha512-MsVItLOJ2R26sie5QTIrd4RKaMAb6auG4xgZoHn1LZ9aiuBC8flYigxRaX5zaaiU69bIFKMLgiPb9XJQ1+nyrQ==}
 
-  undici@6.19.2:
-    resolution: {integrity: sha512-JfjKqIauur3Q6biAtHJ564e3bWa8VvT+7cSiOJHFbX4Erv6CLGDpg8z+Fmg/1OI/47RA+GI2QZaF48SSaLvyBA==}
+  undici@6.19.3:
+    resolution: {integrity: sha512-xWvTmUYvfiKATSKntAVRpPO5bfRcrG9FpiHI916j8dK8nUMjeM0uE8dx7ftKoPUQ2RtRi0KMDL10/03orVgTMA==}
     engines: {node: '>=18.17'}
 
   unicode-canonical-property-names-ecmascript@2.0.0:
@@ -18003,7 +18003,7 @@ snapshots:
 
   undici-types@6.19.3: {}
 
-  undici@6.19.2: {}
+  undici@6.19.3: {}
 
   unicode-canonical-property-names-ecmascript@2.0.0: {}