diff --git a/History.txt b/History.txt
index 1cdc3638..370ae343 100644
--- a/History.txt
+++ b/History.txt
@@ -595,3 +595,16 @@ last several releases.
       - fix include of <x86intrin.h> when using MSVC
       - improve performance of CRC32C_Update_SSE42 for x86-64
       - update documentation
+
+8.9.0 - October 1, 2023
+      - minor release, recompile of programs required
+      - expanded community input and support
+        * 88 unique contributors as of this release
+      - fix SIMON128 Asan finding on POWER8
+      - fix AES/CFB and AES/CTR modes self test failures when using Cryptogams AES on ARMv7
+      - fix ARIA/CTR mode self test failures when inString==outString
+      - fix HIGHT/CTR mode self test failures when inString==outString
+      - fix Rabbit/CTR mode self test failures when inString==outString
+      - fix Prime Table and dangling reference to a temporary>
+      - fix Singleton::Ref when using C++11 memory fences
+      - remove unneeded call to Crop() in Randomize()
diff --git a/Readme.txt b/Readme.txt
index 20683c3e..63b48d3c 100644
--- a/Readme.txt
+++ b/Readme.txt
@@ -1,5 +1,5 @@
 Crypto++: free C++ Class Library of Cryptographic Schemes
-Version 8.9 - TBD
+Version 8.9 - October 1, 2023
 
 Crypto++ Library is a free C++ class library of cryptographic schemes.
 Currently the library contains the following algorithms:
@@ -294,6 +294,19 @@ documentation is one of the highest returns on investment.
 The items in this section comprise the most recent history. Please see History.txt
 for the record back to Crypto++ 1.0.
 
+8.9.0 - October 1, 2023
+      - minor release, recompile of programs required
+      - expanded community input and support
+        * 88 unique contributors as of this release
+      - fix SIMON128 Asan finding on POWER8
+      - fix AES/CFB and AES/CTR modes self test failures when using Cryptogams AES on ARMv7
+      - fix ARIA/CTR mode self test failures when inString==outString
+      - fix HIGHT/CTR mode self test failures when inString==outString
+      - fix Rabbit/CTR mode self test failures when inString==outString
+      - fix Prime Table and dangling reference to a temporary>
+      - fix Singleton::Ref when using C++11 memory fences
+      - remove unneeded call to Crop() in Randomize()
+
 8.8.0 - June 25, 2023
       - minor release, recompile of programs required
       - expanded community input and support