diff --git a/CHANGELOG.md b/CHANGELOG.md
index e4a899cd3..d1f4b4612 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+# v6.13.1
+- [#2468](https://github.com/xmrig/xmrig/pull/2468) Fixed regression in previous version: don't send miner signature during regular mining.
+
+# v6.13.0
+- [#2445](https://github.com/xmrig/xmrig/pull/2445) Added support for solo mining with miner signatures for the upcoming Wownero fork.
+
 # v6.12.2
 - [#2280](https://github.com/xmrig/xmrig/issues/2280) GPU backends are now disabled in benchmark mode.
 - [#2322](https://github.com/xmrig/xmrig/pull/2322) Improved MSR compatibility with recent Linux kernels and updated `randomx_boost.sh`.
diff --git a/scripts/randomx_boost.sh b/scripts/randomx_boost.sh
index f74b34b23..3b60959d9 100755
--- a/scripts/randomx_boost.sh
+++ b/scripts/randomx_boost.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh -e
 
 MSR_FILE=/sys/module/msr/parameters/allow_writes
 
@@ -8,9 +8,9 @@ else
 	modprobe msr allow_writes=on
 fi
 
-if cat /proc/cpuinfo | grep -E 'AMD Ryzen|AMD EPYC' > /dev/null;
+if grep -E 'AMD Ryzen|AMD EPYC' /proc/cpuinfo > /dev/null;
 	then
-	if cat /proc/cpuinfo | grep "cpu family[[:space:]]:[[:space:]]25" > /dev/null;
+	if grep "cpu family[[:space:]]:[[:space:]]25" /proc/cpuinfo > /dev/null;
 		then
 			echo "Detected Zen3 CPU"
 			wrmsr -a 0xc0011020 0x4480000000000
@@ -26,7 +26,7 @@ if cat /proc/cpuinfo | grep -E 'AMD Ryzen|AMD EPYC' > /dev/null;
 			wrmsr -a 0xc001102b 0x2000cc16
 			echo "MSR register values for Zen1/Zen2 applied"
 		fi
-elif cat /proc/cpuinfo | grep "Intel" > /dev/null;
+elif grep "Intel" /proc/cpuinfo > /dev/null;
 	then
 		echo "Detected Intel CPU"
 		wrmsr -a 0x1a4 0xf
diff --git a/src/backend/cpu/CpuWorker.cpp b/src/backend/cpu/CpuWorker.cpp
index fc7d8bf3b..085bccb6c 100644
--- a/src/backend/cpu/CpuWorker.cpp
+++ b/src/backend/cpu/CpuWorker.cpp
@@ -329,7 +329,7 @@ void xmrig::CpuWorker<N>::start()
                     else
 #                   endif
                     if (value < job.target()) {
-                        JobResults::submit(job, current_job_nonces[i], m_hash + (i * 32), miner_signature_saved);
+                        JobResults::submit(job, current_job_nonces[i], m_hash + (i * 32), job.hasMinerSignature() ? miner_signature_saved : nullptr);
                     }
                 }
                 m_count += N;
diff --git a/src/version.h b/src/version.h
index 744b538e0..5dfc7b2b7 100644
--- a/src/version.h
+++ b/src/version.h
@@ -28,7 +28,7 @@
 #define APP_ID        "xmrig"
 #define APP_NAME      "XMRig"
 #define APP_DESC      "XMRig miner"
-#define APP_VERSION   "6.13.0-dev"
+#define APP_VERSION   "6.13.2-dev"
 #define APP_DOMAIN    "xmrig.com"
 #define APP_SITE      "www.xmrig.com"
 #define APP_COPYRIGHT "Copyright (C) 2016-2021 xmrig.com"
@@ -36,7 +36,7 @@
 
 #define APP_VER_MAJOR  6
 #define APP_VER_MINOR  13
-#define APP_VER_PATCH  0
+#define APP_VER_PATCH  2
 
 #ifdef _MSC_VER
 #   if (_MSC_VER >= 1920)