diff --git a/debian/changelog b/debian/changelog
index afb0963d1e..3600b18d2e 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,15 @@
+paasta-tools (1.4.21) xenial; urgency=medium
+
+  * 1.4.21 tagged with 'make release'
+    Commit: MLCOMPUTE-1497 | include spark driver memory overhead in
+    driver pod memory (#3926)  * MLCOMPUTE-1209 | use
+    service_configuration_lib to get total driver memory  * MLCOMPUTE-
+    1209 | increase default Spark driver pod disk to 5GB  * MLCOMPUTE-
+    1209 | prefer disk value if provided  ---------  Co-authored-by:
+    Sameer Sharma <sameersharma@yelp.com>
+
+ -- Sameer Sharma <sameersharma@yelp.com>  Thu, 08 Aug 2024 03:24:06 -0700
+
 paasta-tools (1.4.20) xenial; urgency=medium
 
   * 1.4.20 tagged with 'make release'
diff --git a/paasta_tools/__init__.py b/paasta_tools/__init__.py
index b0efcdf743..00d7df5928 100644
--- a/paasta_tools/__init__.py
+++ b/paasta_tools/__init__.py
@@ -17,4 +17,4 @@
 # setup phase, the dependencies may not exist on disk yet.
 #
 # Don't bump version manually. See `make release` docs in ./Makefile
-__version__ = "1.4.20"
+__version__ = "1.4.21"
diff --git a/yelp_package/Makefile b/yelp_package/Makefile
index 45911146c4..391fc43d9b 100644
--- a/yelp_package/Makefile
+++ b/yelp_package/Makefile
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # Edit this release and run "make release"
-RELEASE=1.4.20
+RELEASE=1.4.21
 
 SHELL=/bin/bash