diff --git a/src/lib-program-client/program-client-remote.c b/src/lib-program-client/program-client-remote.c
index 212caf707f..1f228f1f75 100644
--- a/src/lib-program-client/program-client-remote.c
+++ b/src/lib-program-client/program-client-remote.c
@@ -18,7 +18,7 @@
 #include <sys/wait.h>
 #include <sysexits.h>
 
-#define PROGRAM_CLIENT_VERSION_MAJOR "3"
+#define PROGRAM_CLIENT_VERSION_MAJOR "4"
 #define PROGRAM_CLIENT_VERSION_MINOR "0"
 
 #define PROGRAM_CLIENT_VERSION_STRING "VERSION\tscript\t" \
diff --git a/src/util/script.c b/src/util/script.c
index 6ce6957c27..b53e9af3a7 100644
--- a/src/util/script.c
+++ b/src/util/script.c
@@ -16,7 +16,7 @@
 #include <sys/wait.h>
 #include <sys/socket.h>
 
-#define SCRIPT_MAJOR_VERSION 3
+#define SCRIPT_MAJOR_VERSION 4
 #define SCRIPT_READ_TIMEOUT_SECS 10
 
 static ARRAY_TYPE(const_string) exec_args;