diff --git a/.mci.yml b/.mci.yml
index f89d61370b..478312c514 100644
--- a/.mci.yml
+++ b/.mci.yml
@@ -7,12 +7,12 @@
 #######################################
 variables:
 
-    mongoc_version_default: &mongoc_version_default "a41683b76fce42f841318d5bb8d926154f9438c8" # TODO: update to 1.24.0 once released.
+    mongoc_version_default: &mongoc_version_default "1.24.0"
 
     # If updating mongoc_version_minimum, also update:
     # - the default value of --c-driver-build-ref in etc/make_release.py
     # - LIBMONGOC_REQUIRED_VERSION in src/mongocxx/CMakeLists.txt
-    mongoc_version_minimum: &mongoc_version_minimum "a41683b76fce42f841318d5bb8d926154f9438c8" # TODO: update to 1.24.0 once released.
+    mongoc_version_minimum: &mongoc_version_minimum "1.24.0"
 
     mongodb_version:
         version_latest: &version_latest "latest"
diff --git a/etc/make_release.py b/etc/make_release.py
index f2d29ec69d..d6ba89f801 100755
--- a/etc/make_release.py
+++ b/etc/make_release.py
@@ -84,7 +84,7 @@
               show_default=True,
               help='The remote reference which points to the mongodb/mongo-cxx-driver repo')
 @click.option('--c-driver-build-ref',
-              default='a41683b76fce42f841318d5bb8d926154f9438c8',
+              default='1.24.0',
               show_default=True,
               help='When building the C driver, build at this Git reference')
 @click.option('--with-c-driver',
diff --git a/src/bsoncxx/CMakeLists.txt b/src/bsoncxx/CMakeLists.txt
index 3c7504fd8f..f30aea8364 100644
--- a/src/bsoncxx/CMakeLists.txt
+++ b/src/bsoncxx/CMakeLists.txt
@@ -73,7 +73,7 @@ message ("bsoncxx version: ${BSONCXX_VERSION}")
 set(BSONCXX_INLINE_NAMESPACE "v${BSONCXX_ABI_VERSION}")
 set(BSONCXX_HEADER_INSTALL_DIR "${CMAKE_INSTALL_INCLUDEDIR}/bsoncxx/${BSONCXX_INLINE_NAMESPACE}" CACHE INTERNAL "")
 
-set(LIBBSON_REQUIRED_VERSION 1.13.0)
+set(LIBBSON_REQUIRED_VERSION 1.24.0)
 set(LIBBSON_REQUIRED_ABI_VERSION 1.0)
 
 set(bsoncxx_pkg_dep "")
diff --git a/src/mongocxx/CMakeLists.txt b/src/mongocxx/CMakeLists.txt
index e218d884d4..45fd3ad4f4 100644
--- a/src/mongocxx/CMakeLists.txt
+++ b/src/mongocxx/CMakeLists.txt
@@ -29,7 +29,7 @@ message ("mongocxx version: ${MONGOCXX_VERSION}")
 set(MONGOCXX_INLINE_NAMESPACE "v${MONGOCXX_ABI_VERSION}")
 set(MONGOCXX_HEADER_INSTALL_DIR "${CMAKE_INSTALL_INCLUDEDIR}/mongocxx/${MONGOCXX_INLINE_NAMESPACE}" CACHE INTERNAL "")
 
-set(LIBMONGOC_REQUIRED_VERSION 1.22.1) # TODO: update to 1.24.0 once released.
+set(LIBMONGOC_REQUIRED_VERSION 1.24.0)
 set(LIBMONGOC_REQUIRED_ABI_VERSION 1.0)
 
 set(mongocxx_pkg_dep "")