diff --git a/README.md b/README.md
index 6bc99a9f5..cbda0eafa 100644
--- a/README.md
+++ b/README.md
@@ -105,6 +105,10 @@ Made with [contrib.rocks](https://contrib.rocks).
 
 ### bioimageio.spec Python package
 
+#### bioimageio.spec 0.5.3post4
+
+* fix pinning of pydantic
+
 #### bioimageio.spec 0.5.3post3
 
 * update resolving of bioimage.io resource IDs
diff --git a/bioimageio/spec/VERSION b/bioimageio/spec/VERSION
index 459e307b6..eecd35939 100644
--- a/bioimageio/spec/VERSION
+++ b/bioimageio/spec/VERSION
@@ -1,3 +1,3 @@
 {
-    "version": "0.5.3post3"
+    "version": "0.5.3post4"
 }
diff --git a/setup.py b/setup.py
index 3de60e498..bf509e789 100644
--- a/setup.py
+++ b/setup.py
@@ -37,7 +37,7 @@
         "packaging>=17.0",
         "pooch>=1.5,<2",
         "pydantic-settings",
-        "pydantic>=2.6.3,<3",
+        "pydantic>=2.7.0,<3",
         "python-dateutil",
         "python-dotenv",
         "requests",