diff --git a/CHANGELOG.md b/CHANGELOG.md
index ab825141..4c601f0a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,45 @@
 # Changelog
 
+## securesystemslib v1.0.0
+
+Securesystemslib API is now considered stable. The core functionality is
+provided in the _Signer_ interface and the half a dozen integrated _Signer_
+implementations that can be found in the `signer` module. Smaller helper
+modules `dsse`, `formats`, `hash` and `storage` are also part of the API.
+Several legacy modules have been removed.
+
+### Added
+* Signer: add public_key attribute to interface (#756)
+* VaultSigner: Signer implementation for HashiCorp Vault (#800)
+* CryptoSigner: support ecdsa keytype that is no longer in spec (#711)
+* CryptoSigner: add private_bytes property (#799)
+* CryptoSigner: add `"file2"` signer uri (#759)
+* test: use localstack to test AWSSigner (#777)
+
+### Removed
+* CryptoSigner: remove `"file"` signer uri (#759)
+* migration script for legacy keys  (#770)
+* `SSlibSigner` class and `*_securesystemslib_key` methods (#771)
+* legacy key `key*`, `interface`, `util` and `schema` modules (#772, #773, #776)
+* unused functions in `hash`, and `formats` module (#774, #776)
+* unused global key constants (#806)
+
+### Changed
+* SSlibKey: strengthen input validation (#780, #795)
+* AWSSigner: support default scheme and add stronger input validation (#724, #778)
+* dsse: change Envelope.signatures type to dict (#743)
+* vendor: update ed25519 copy (#793)
+* docs: improve user and contributor docs (#744, #745, #746, #749, #759, #796)
+* test: improve and temporarily disable SigstoreSigner test (#779, #785)
+* ci: use dependabot groups, update weekly (#735)
+* ci: test macOS and Windows on latest Python only (#797)
+* Make securessystemslib.gpg internal (#792)
+
+### Fixed
+* Fix check-upstream-ed25519 workflow permission (#706)
+* SSlibKey: fix default scheme and test for ecdsa nistp384 key (#763 #794)
+
+
 ## securesystemslib v0.31.0
 
 ### Added
diff --git a/securesystemslib/__init__.py b/securesystemslib/__init__.py
index 61744dab..83a55f37 100755
--- a/securesystemslib/__init__.py
+++ b/securesystemslib/__init__.py
@@ -1,7 +1,7 @@
 # pylint: disable=missing-module-docstring
 import logging
 
-__version__ = "0.31.0"
+__version__ = "1.0.0"
 
 # Configure a basic 'securesystemslib' top-level logger with a StreamHandler
 # (print to console) and the WARNING log level (print messages of type