--- src/openvpn/options.c	2017-12-07 13:21:03.915892000 +1100
+++ src/openvpn/options.c	2017-12-07 13:27:37.871452518 +1100
@@ -4267,6 +4267,20 @@
            int msglevel,
            struct gc_arena *gc)
 {
+    return parse_line_extra(line, p, n, file, line_num,
+    msglevel, gc, OPTION_PARM_SIZE);
+}
+
+int
+parse_line_extra(const char *line,
+           char *p[],
+           const int n,
+           const char *file,
+           const int line_num,
+           int msglevel,
+           struct gc_arena *gc,
+           int param_len)
+{
     const int STATE_INITIAL = 0;
     const int STATE_READING_QUOTED_PARM = 1;
     const int STATE_READING_UNQUOTED_PARM = 2;
@@ -4281,7 +4295,7 @@
     bool backslash = false;
     char in, out;
 
-    char parm[OPTION_PARM_SIZE];
+    char parm[param_len];
     unsigned int parm_len = 0;
 
     msglevel &= ~M_OPTERR;
--- src/openvpn/options.h	2017-09-26 19:27:37.000000000 +1000
+++ src/openvpn/options.h	2017-12-07 13:22:35.103803335 +1100
@@ -56,6 +56,7 @@
  * Max size of options line and parameter.
  */
 #define OPTION_PARM_SIZE 256
+#define OPTION_LONG_PARM_SIZE 2048
 #define OPTION_LINE_SIZE 256
 
 extern const char title_string[];
--- src/openvpn/manage.c	2017-12-07 13:21:03.911892000 +1100
+++ src/openvpn/manage.c	2017-12-07 13:30:16.550784231 +1100
@@ -2021,7 +2021,7 @@
     }
     else
     {
-        nparms = parse_line(line, parms, MAX_PARMS, "TCP", 0, M_CLIENT, &gc);
+        nparms = parse_line_extra(line, parms, MAX_PARMS, "TCP", 0, M_CLIENT, &gc, OPTION_LONG_PARM_SIZE);
         if (parms[0] && streq(parms[0], "password"))
         {
             msg(D_MANAGEMENT_DEBUG, "MANAGEMENT: CMD 'password [...]'");