diff --git a/VERSION b/VERSION
index 10520ec..6e36596 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-MsSpec-1.3.post2
+MsSpec-1.3post4
diff --git a/src/msspec/__init__.py b/src/msspec/__init__.py
index 0e544ba..2d4b582 100644
--- a/src/msspec/__init__.py
+++ b/src/msspec/__init__.py
@@ -1 +1 @@
-__version__ = '1.2rc3.post152'
+__version__ = '1.3post4'
diff --git a/src/msspec/msspecgui/__init__.py b/src/msspec/msspecgui/__init__.py
index 0e544ba..2d4b582 100644
--- a/src/msspec/msspecgui/__init__.py
+++ b/src/msspec/msspecgui/__init__.py
@@ -1 +1 @@
-__version__ = '1.2rc3.post152'
+__version__ = '1.3post4'