diff --git a/install-k b/install-k
index 36691f998cb..7616d3e6474 100755
--- a/install-k
+++ b/install-k
@@ -1,6 +1,6 @@
 #!/bin/sh -e
 
-K_VERSION=5.3.90
+K_VERSION=5.3.91
 
 if [ `id -u` -ne 0 ]; then
   echo "$0: error: This script must be run as root."
diff --git a/package/arch/PKGBUILD b/package/arch/PKGBUILD
index b1890a8b03b..11be7ad13ed 100644
--- a/package/arch/PKGBUILD
+++ b/package/arch/PKGBUILD
@@ -1,6 +1,6 @@
 # Maintainer: Dwight Guth <dwight.guth@runtimeverification.com>
 pkgname=kframework-git
-pkgver=5.3.90
+pkgver=5.3.91
 pkgrel=1
 epoch=
 pkgdesc="K framework toolchain. Includes K Framework compiler for K language definitions, and K interpreter and prover for programs written in languages defined in K."
diff --git a/package/debian/changelog b/package/debian/changelog
index c6a33221ef3..368158213f5 100644
--- a/package/debian/changelog
+++ b/package/debian/changelog
@@ -1,4 +1,4 @@
-kframework (5.3.90) unstable; urgency=medium
+kframework (5.3.91) unstable; urgency=medium
 
   * Initial Release.
 
diff --git a/package/version b/package/version
index f0cf1b3c84a..f268514e354 100644
--- a/package/version
+++ b/package/version
@@ -1 +1 @@
-5.3.90
+5.3.91
diff --git a/src/main/scripts/test-in-container-debian b/src/main/scripts/test-in-container-debian
index 8abebc32c19..377f7a8577c 100755
--- a/src/main/scripts/test-in-container-debian
+++ b/src/main/scripts/test-in-container-debian
@@ -1,5 +1,5 @@
 #!/bin/sh -ex
-K_VERSION=5.3.90
+K_VERSION=5.3.91
 export DEBIAN_FRONTEND=noninteractive
 apt-get update
 apt-get upgrade --yes