diff --git a/src/openvpn/options.c b/src/openvpn/options.c
index 1beb0ee..10ee9f6 100644
--- a/src/openvpn/options.c
+++ b/src/openvpn/options.c
@@ -2032,8 +2032,8 @@
 
     SHOW_INT(tls_timeout);
 
-    SHOW_INT(renegotiate_bytes);
-    SHOW_INT(renegotiate_packets);
+    SHOW_INT64(renegotiate_bytes);
+    SHOW_INT64(renegotiate_packets);
     SHOW_INT(renegotiate_seconds);
 
     SHOW_INT(handshake_window);
@@ -9187,12 +9187,26 @@
     else if (streq(p[0], "reneg-bytes") && p[1] && !p[2])
     {
         VERIFY_PERMISSION(OPT_P_TLS_PARMS);
-        options->renegotiate_bytes = positive_atoi(p[1]);
+        char *end;
+        long long reneg_bytes = strtoll(p[1], &end, 10);
+        if (*end != '\0' || reneg_bytes < 0)
+        {
+            msg(msglevel, "--reneg-bytes parameter must be an integer and >= 0");
+            goto err;
+        }
+        options->renegotiate_bytes = reneg_bytes;
     }
     else if (streq(p[0], "reneg-pkts") && p[1] && !p[2])
     {
         VERIFY_PERMISSION(OPT_P_TLS_PARMS);
-        options->renegotiate_packets = positive_atoi(p[1]);
+        char *end;
+        long long pkt_max = strtoll(p[1], &end, 10);
+        if (*end != '\0' || pkt_max < 0)
+        {
+            msg(msglevel, "--reneg-pkts parameter must be an integer and >= 0");
+            goto err;
+        }
+        options->renegotiate_packets = pkt_max;
     }
     else if (streq(p[0], "reneg-sec") && p[1] && !p[3])
     {
diff --git a/src/openvpn/options.h b/src/openvpn/options.h
index ee39dbb..6ab92e2 100644
--- a/src/openvpn/options.h
+++ b/src/openvpn/options.h
@@ -626,8 +626,8 @@
     int tls_timeout;
 
     /* Data channel key renegotiation parameters */
-    int renegotiate_bytes;
-    int renegotiate_packets;
+    int64_t renegotiate_bytes;
+    int64_t renegotiate_packets;
     int renegotiate_seconds;
     int renegotiate_seconds_min;
 
diff --git a/src/openvpn/ssl.c b/src/openvpn/ssl.c
index c48a85c..ab55365 100644
--- a/src/openvpn/ssl.c
+++ b/src/openvpn/ssl.c
@@ -118,7 +118,7 @@
  *                      May *not* be NULL.
  */
 static void
-tls_limit_reneg_bytes(const char *ciphername, int *reneg_bytes)
+tls_limit_reneg_bytes(const char *ciphername, int64_t *reneg_bytes)
 {
     if (cipher_kt_insecure(ciphername))
     {
@@ -3028,7 +3028,7 @@
         && should_trigger_renegotiation(session, ks))
    {
         msg(D_TLS_DEBUG_LOW, "TLS: soft reset sec=%d/%d bytes=" counter_format
-            "/%d pkts=" counter_format "/%d",
+            "/%" PRIi64 " pkts=" counter_format "/%" PRIi64,
             (int) (now - ks->established), session->opt->renegotiate_seconds,
             ks->n_bytes, session->opt->renegotiate_bytes,
             ks->n_packets, session->opt->renegotiate_packets);
diff --git a/src/openvpn/ssl_common.h b/src/openvpn/ssl_common.h
index 5bc2f2a..5840e2d 100644
--- a/src/openvpn/ssl_common.h
+++ b/src/openvpn/ssl_common.h
@@ -331,8 +331,8 @@
     int transition_window;
     int handshake_window;
     interval_t packet_timeout;
-    int renegotiate_bytes;
-    int renegotiate_packets;
+    int64_t renegotiate_bytes;
+    int64_t renegotiate_packets;
     interval_t renegotiate_seconds;
 
     /* cert verification parms */