diff --git a/capnp/CHANGELOG.md b/capnp/CHANGELOG.md
index 50f8fb75c..5a0c7c3bc 100644
--- a/capnp/CHANGELOG.md
+++ b/capnp/CHANGELOG.md
@@ -1,3 +1,7 @@
+## v0.20.2
+- Fix bug where `ptr::copy_nonoverlapping()` was potentially being called
+  on invalid pointers (with length = 0).
+
 ## v0.20.1
 - Add support for downcasting dynamic values to fully concrete list and
   struct types.
diff --git a/capnp/Cargo.toml b/capnp/Cargo.toml
index f18bc4df9..a24b1b8f5 100644
--- a/capnp/Cargo.toml
+++ b/capnp/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 
 name = "capnp"
-version = "0.20.1"
+version = "0.20.2"
 authors = [ "David Renshaw <dwrenshaw@gmail.com>" ]
 license = "MIT"
 description = "runtime library for Cap'n Proto data encoding"