diff --git a/CHANGELOG.md b/CHANGELOG.md
index bb3f5cb..1a27b62 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,15 @@ format changes.
 
 ## [Unreleased]
 
+## [1.0.0] — 2026-05-13
+
+First major-version cut. Implements the three one-time spec changes
+from the protowire v1.0 freeze line in lockstep with `protowire`,
+`protowire-go`, and `protowire-typescript`. **Breaking** — there is
+no alias period; v1.0 is itself the major bump. Maven group remains
+`org.protowire`; the published artifact is `protowire-pxf` (and the
+sibling modules `pb`, `sbe`, `envelope`, `proto-annotations`).
+
 ### v1.0 spec changes
 
 Three one-time spec changes from the protowire v1.0 freeze line
diff --git a/build.gradle.kts b/build.gradle.kts
index bbf53e7..4ccc01a 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -12,7 +12,7 @@ plugins {
 
 allprojects {
     group = "org.protowire"
-    version = "0.70.0"
+    version = "1.0.0"
 
     repositories {
         mavenCentral()