diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1930e297..9208c7d7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## 0.12.0 (unreleased)
+## 0.12.0 (2020-09-04)
 
 ### Breaking
 
diff --git a/Cargo.lock b/Cargo.lock
index 4647d593..de7a7490 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1758,9 +1758,9 @@ checksum = "eba180dafb9038b050a4c280019bbedf9f2467b61e5d892dcad585bb57aadc5a"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.19"
+version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04f5f085b5d71e2188cb8271e5da0161ad52c3f227a661a3c135fdf28e258b12"
+checksum = "175c513d55719db99da20232b06cda8bab6b83ec2d04e3283edf0213c37c1a29"
 dependencies = [
  "unicode-xid",
 ]