diff --git a/CHANGELOG.md b/CHANGELOG.md
index a6f08db..c7d4d18 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 0.1.1 (unreleased)
+## 0.1.1 (2021-04-25)
 
 - Added binary representation for `COPY`
 - Marked functions as `PARALLEL SAFE`
diff --git a/README.md b/README.md
index ead19ac..51bbcc1 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ Supports L2 distance, inner product, and cosine distance
 Compile and install the extension (supports Postgres 9.6+)
 
 ```sh
-git clone --branch v0.1.0 https://github.com/ankane/pgvector.git
+git clone --branch v0.1.1 https://github.com/ankane/pgvector.git
 cd pgvector
 make
 make install # may need sudo
@@ -136,6 +136,16 @@ Libraries that use pgvector:
 
 - [Neighbor](https://github.com/ankane/neighbor) (Ruby)
 
+## Upgrading
+
+### 0.1.1
+
+Follow the [installation instructions](#installation) and run:
+
+```sql
+ALTER EXTENSION vector UPDATE TO '0.1.1';
+```
+
 ## Thanks
 
 Thanks to: