diff --git a/CHANGELOG.md b/CHANGELOG.md
index 676eff98c..461301e1d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,33 @@
+2021-03-09 v1.0.9
+=================
+
+This release includes important security fixes introduced in third-party
+packages and brings further performance improvements.
+
+-----
+
+**We've upgraded:**
+
+* The BLST library is now version 0.3.3:
+  https://github.com/supranational/blst/releases/tag/v0.3.3
+
+* We've switched to a more recent version of BearSSL, featuring a more
+  up-to-date list of trusted root certificates.
+
+* The Eth2 spec has been upgraded to 1.0.1.
+
+**We've fixed:**
+
+* Long processing delays triggered by the reception of attestations that
+  reference already pruned states.
+
+* LibP2P peer management issue leading to accumulation of inactive
+  connections.
+
+* A false-positive in doppelganger detection triggered by rebroadcasted
+  older attestations arriving with a significant delay.
+
+
 2021-02-22 v1.0.8
 =================
 
diff --git a/beacon_chain/version.nim b/beacon_chain/version.nim
index 8a4940a2d..346c5a48e 100644
--- a/beacon_chain/version.nim
+++ b/beacon_chain/version.nim
@@ -9,7 +9,7 @@ when not defined(nimscript):
 const
   versionMajor* = 1
   versionMinor* = 0
-  versionBuild* = 8
+  versionBuild* = 9
 
   versionBlob* = "stateofus" # Single word - ends up in the default graffitti