diff --git a/.gitignore b/.gitignore
index 64f41b5..5473081 100644
--- a/.gitignore
+++ b/.gitignore
@@ -440,3 +440,4 @@ network-manager-applet-0.8.1.tar.bz2
 /NetworkManager-1.43.90.tar.xz
 /NetworkManager-1.44.0.tar.xz
 /NetworkManager-1.45.2.tar.xz
+/NetworkManager-1.45.3.tar.xz
diff --git a/NetworkManager.spec b/NetworkManager.spec
index 3667a23..8f2728f 100644
--- a/NetworkManager.spec
+++ b/NetworkManager.spec
@@ -4,7 +4,7 @@
 %global glib2_version %(pkg-config --modversion glib-2.0 2>/dev/null || echo bad)
 
 %global epoch_version 1
-%global real_version 1.45.2
+%global real_version 1.45.3
 %global rpm_version %{real_version}
 %global release_version 1
 %global snapshot %{nil}
@@ -1252,6 +1252,13 @@ fi
 
 
 %changelog
+* Fri Sep 22 2023 Beniamino Galvani <bgalvani@redhat.com> - 1.45.3-1
+- Update to 1.45.3 release (development)
+- Improve explanation of the format and routes properties in keyfile man page (RHEL-1407)
+- Improve nm-settings-nmcli manpage to show format and valid values of properties (RHEL-2465)
+- Honor the autoactivate priority for port connections (RHEL-2202)
+- Properly document valid values for ip-tunnel properties (RHEL-1459)
+
 * Wed Sep  6 2023 Beniamino Galvani <bgalvani@redhat.com> - 1.45.2-1
 - update to 1.45.2 release (development)
 
diff --git a/sources b/sources
index 4a71c6c..104ed0c 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (NetworkManager-1.45.2.tar.xz) = 8324939611058ec0dd75da197c4751c8b12d323169a2580b52da3a44e6b0b4fe68b988db3752e45efc4e8dea75240dca9c2f23acc0710d9954523ca3ad3ca2c1
+SHA512 (NetworkManager-1.45.3.tar.xz) = 3e8892ee8083195d2480a1a88d4327da829d238304ffc4aad042530f1bc4112477b27562e4e4d88d105dfb1b1823d729abba71aadf66a637418d9306622cde87