diff --git a/bin/a2l b/bin/a2l
index 5cc17528..84708b02 100755
--- a/bin/a2l
+++ b/bin/a2l
@@ -12,7 +12,7 @@ set -eEuo pipefail
 
 # NOTE: DO NOT declare var PROG as readonly, because its value is supplied by subshell.
 PROG="$(basename "$0")"
-readonly PROG_VERSION='2.5.0-dev'
+readonly PROG_VERSION='2.4.2'
 
 ################################################################################
 # util functions
diff --git a/bin/ap b/bin/ap
index 7db14ae8..5041ebb9 100755
--- a/bin/ap
+++ b/bin/ap
@@ -14,7 +14,7 @@ set -eEuo pipefail
 
 # NOTE: DO NOT declare var PROG as readonly, because its value is supplied by subshell.
 PROG="$(basename "$0")"
-readonly PROG_VERSION='2.5.0-dev'
+readonly PROG_VERSION='2.4.2'
 
 ################################################################################
 # util functions
diff --git a/bin/c b/bin/c
index 21f76777..ab778897 100755
--- a/bin/c
+++ b/bin/c
@@ -22,7 +22,7 @@ set -eEuo pipefail
 
 # NOTE: DO NOT declare var PROG as readonly, because its value is supplied by subshell.
 PROG="$(basename "$0")"
-readonly PROG_VERSION='2.5.0-dev'
+readonly PROG_VERSION='2.4.2'
 
 ################################################################################
 # util functions
diff --git a/bin/cp-into-docker-run b/bin/cp-into-docker-run
index 99de0525..7a5574d8 100755
--- a/bin/cp-into-docker-run
+++ b/bin/cp-into-docker-run
@@ -10,7 +10,7 @@
 set -eEuo pipefail
 
 PROG="$(basename "$0")"
-readonly PROG_VERSION='2.5.0-dev'
+readonly PROG_VERSION='2.4.2'
 
 ################################################################################
 # util functions
diff --git a/bin/find-in-jars b/bin/find-in-jars
index e9c4af27..08e7383c 100755
--- a/bin/find-in-jars
+++ b/bin/find-in-jars
@@ -27,7 +27,7 @@ set -eEuo pipefail
 
 # NOTE: DO NOT declare var PROG as readonly, because its value is supplied by subshell.
 PROG="$(basename "$0")"
-readonly PROG_VERSION='2.5.0-dev'
+readonly PROG_VERSION='2.4.2'
 
 ################################################################################
 # util functions
diff --git a/bin/rp b/bin/rp
index f0f70eee..59735a40 100755
--- a/bin/rp
+++ b/bin/rp
@@ -14,7 +14,7 @@ set -eEuo pipefail
 
 # NOTE: DO NOT declare var PROG as readonly, because its value is supplied by subshell.
 PROG="$(basename "$0")"
-readonly PROG_VERSION='2.5.0-dev'
+readonly PROG_VERSION='2.4.2'
 
 ################################################################################
 # util functions
diff --git a/bin/show-busy-java-threads b/bin/show-busy-java-threads
index 7ddc41f5..c6a2073a 100755
--- a/bin/show-busy-java-threads
+++ b/bin/show-busy-java-threads
@@ -21,7 +21,7 @@
 
 # NOTE: DO NOT declare var PROG as readonly, because its value is supplied by subshell.
 PROG="$(basename "$0")"
-readonly PROG_VERSION='2.5.0-dev'
+readonly PROG_VERSION='2.4.2'
 # choosing between $0 and BASH_SOURCE
 # https://stackoverflow.com/a/35006505/922688
 # How can I get the source directory of a Bash script from within the script itself?
diff --git a/bin/show-duplicate-java-classes b/bin/show-duplicate-java-classes
index f874864a..cfbde0d4 100755
--- a/bin/show-duplicate-java-classes
+++ b/bin/show-duplicate-java-classes
@@ -30,7 +30,7 @@ from zipfile import ZipFile, BadZipfile
 ################################################################################
 # utils functions
 ################################################################################
-PROG_VERSION = '2.5.0-dev'
+PROG_VERSION = '2.4.2'
 
 # How to delete line with echo?
 # https://unix.stackexchange.com/questions/26576
diff --git a/bin/tcp-connection-state-counter b/bin/tcp-connection-state-counter
index 7231320b..bf71c3e9 100755
--- a/bin/tcp-connection-state-counter
+++ b/bin/tcp-connection-state-counter
@@ -12,7 +12,7 @@ set -eEuo pipefail
 
 # NOTE: DO NOT declare var PROG as readonly, because its value is supplied by subshell.
 PROG="$(basename "$0")"
-readonly PROG_VERSION='2.5.0-dev'
+readonly PROG_VERSION='2.4.2'
 
 ################################################################################
 # util functions
diff --git a/bin/uq b/bin/uq
index c50ba1b9..8aa1ab88 100755
--- a/bin/uq
+++ b/bin/uq
@@ -24,7 +24,7 @@ set -eEuo pipefail
 
 # NOTE: DO NOT declare var PROG as readonly, because its value is supplied by subshell.
 PROG="$(basename "$0")"
-readonly PROG_VERSION='2.5.0-dev'
+readonly PROG_VERSION='2.4.2'
 
 ################################################################################
 # util functions
diff --git a/bin/xpl b/bin/xpl
index dbe1f13d..8d0f4446 100755
--- a/bin/xpl
+++ b/bin/xpl
@@ -21,7 +21,7 @@ set -eEuo pipefail
 
 # NOTE: DO NOT declare var PROG as readonly, because its value is supplied by subshell.
 PROG="$(basename "$0")"
-readonly PROG_VERSION='2.5.0-dev'
+readonly PROG_VERSION='2.4.2'
 
 readonly nl=$'\n' # new line
 
diff --git a/legacy-bin/cp-svn-url b/legacy-bin/cp-svn-url
index 30bafcb0..60eb4fac 100755
--- a/legacy-bin/cp-svn-url
+++ b/legacy-bin/cp-svn-url
@@ -21,7 +21,7 @@
 
 # NOTE: DO NOT declare var PROG as readonly, because its value is supplied by subshell.
 PROG="$(basename "$0")"
-readonly PROG_VERSION='2.5.0-dev'
+readonly PROG_VERSION='2.4.2'
 
 usage() {
     cat <<EOF