diff --git a/src/plugins/fts/fts-parser-script.c b/src/plugins/fts/fts-parser-script.c
index 1cea6adfe6..6e69fde328 100644
--- a/src/plugins/fts/fts-parser-script.c
+++ b/src/plugins/fts/fts-parser-script.c
@@ -15,7 +15,7 @@
 #define SCRIPT_USER_CONTEXT(obj) \
 	MODULE_CONTEXT(obj, fts_parser_script_user_module)
 
-#define SCRIPT_HANDSHAKE "VERSION\tscript\t3\t0\nalarm=10\nnoreply\n"
+#define SCRIPT_HANDSHAKE "VERSION\tscript\t4\t0\nalarm=10\nnoreply\n"
 
 struct content {
 	const char *content_type;
diff --git a/src/plugins/mail-filter/istream-ext-filter.c b/src/plugins/mail-filter/istream-ext-filter.c
index 1ed55238e6..5bd90774f8 100644
--- a/src/plugins/mail-filter/istream-ext-filter.c
+++ b/src/plugins/mail-filter/istream-ext-filter.c
@@ -173,7 +173,7 @@ static int filter_connect(struct mail_filter_istream *mstream,
 	mstream->ext_out = o_stream_create_fd(fd, 0, FALSE);
 
 	str = t_str_new(256);
-	str_append(str, "VERSION\tscript\t3\t0\nnoreply\n");
+	str_append(str, "VERSION\tscript\t4\t0\nnoreply\n");
 	for (; *argv != NULL; argv++) {
 		str_append(str, *argv);
 		str_append_c(str, '\n');
diff --git a/src/plugins/mail-filter/ostream-ext-filter.c b/src/plugins/mail-filter/ostream-ext-filter.c
index e3f0700352..4ebfce08af 100644
--- a/src/plugins/mail-filter/ostream-ext-filter.c
+++ b/src/plugins/mail-filter/ostream-ext-filter.c
@@ -146,7 +146,7 @@ static int filter_connect(struct mail_filter_ostream *mstream,
 	mstream->ext_out = o_stream_create_fd(fd, 0, FALSE);
 
 	str = t_str_new(256);
-	str_append(str, "VERSION\tscript\t3\t0\nnoreply\n");
+	str_append(str, "VERSION\tscript\t4\t0\nnoreply\n");
 	for (; *argv != NULL; argv++) {
 		str_append(str, *argv);
 		str_append_c(str, '\n');
diff --git a/src/plugins/welcome/welcome-plugin.c b/src/plugins/welcome/welcome-plugin.c
index fcb771e457..65c29a5d77 100644
--- a/src/plugins/welcome/welcome-plugin.c
+++ b/src/plugins/welcome/welcome-plugin.c
@@ -52,7 +52,7 @@ static void script_execute(struct mail_user *user, const char *cmd, bool wait)
 	}
 
 	str = t_str_new(1024);
-	str_append(str, "VERSION\tscript\t3\t0\n");
+	str_append(str, "VERSION\tscript\t4\t0\n");
 	if (!wait)
 		str_append(str, "noreply\n");
 	else