stable null safety release (#73)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index abd0bd8..5ee9ebb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.0
+
+* Stable null safety release.
+
 ## 1.0.0-nullsafety.0
 
 * Migrate to null safety.
diff --git a/pubspec.yaml b/pubspec.yaml
index 1e232ce..7dc7da0 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: fixnum
-version: 1.0.0-nullsafety.0
+version: 1.0.0
 
 description: >-
   Library for 32- and 64-bit signed fixed-width integers with consistent
@@ -10,5 +10,5 @@
   sdk: '>=2.12.0-0 <3.0.0'
 
 dev_dependencies:
-  pedantic: ^1.10.0-nullsafety
+  pedantic: ^1.10.0
   test: ^1.16.0-nullsafety