diff --git a/src/camera.cpp b/src/camera.cpp
index d768f53..481cbd1 100644
--- a/src/camera.cpp
+++ b/src/camera.cpp
@@ -248,8 +248,10 @@ bool Upkeep::exec()
     dumpLogs(QString("logs/") + REC_LOG_NAME, shared->recLog);
     dumpLogs(QString("logs/") + DET_LOG_NAME, shared->detLog);
 
+    shared->logMutex.lock();
     shared->recLog.clear();
     shared->detLog.clear();
+    shared->logMutex.unlock();
 
     initLogFrontPages();
     enforceMaxEvents(shared);
@@ -308,6 +310,8 @@ bool EventLoop::exec()
 
         while (!shared->recList.isEmpty())
         {
+            shared->recMutex.lock();
+
             auto event    = shared->recList[0];
             auto maxFiles = shared->evMaxSecs / 2;
                 // there's 2 secs in each hls segment
@@ -324,6 +328,7 @@ bool EventLoop::exec()
             vidList.append(forwardFacingFiles("live", ".ts", event.timeStamp, maxFiles / 2));
 
             shared->recList.removeFirst();
+            shared->recMutex.unlock();
         }
     }
 
@@ -494,7 +499,9 @@ bool DetectLoop::exec()
                 event.score     = score;
                 event.imgPath   = images[pos];
 
+                shared->recMutex.lock();
                 shared->recList.append(event); mod = true;
+                shared->recMutex.unlock();
             }
         }
     }
diff --git a/src/common.h b/src/common.h
index 993ac88..e0b4868 100644
--- a/src/common.h
+++ b/src/common.h
@@ -25,10 +25,11 @@
 #include <QThread>
 #include <QTimer>
 #include <QStringList>
+#include <QMutex>
 
 using namespace std;
 
-#define APP_VER      "3.0.t15"
+#define APP_VER      "3.0.t16"
 #define APP_NAME     "Motion Watch"
 #define APP_BIN      "mow"
 #define REC_LOG_NAME "rec_log_lines.html"
@@ -49,6 +50,8 @@ struct evt_t
 struct shared_t
 {
     QList<evt_t> recList;
+    QMutex       recMutex;
+    QMutex       logMutex;
     QString      conf;
     QString      recLog;
     QString      detLog;
diff --git a/src/logger.cpp b/src/logger.cpp
index 293b64b..dc6485c 100644
--- a/src/logger.cpp
+++ b/src/logger.cpp
@@ -14,12 +14,20 @@
 
 void recLog(const QString &line, shared_t *share)
 {
+    share->logMutex.lock();
+
     share->recLog += QDateTime::currentDateTime().toString("[yyyy-MM-dd-hh-mm-ss] ") + line + "<br>\n";
+
+    share->logMutex.unlock();
 }
 
 void detLog(const QString &line, shared_t *share)
 {
+    share->logMutex.lock();
+
     share->detLog += QDateTime::currentDateTime().toString("[yyyy-MM-dd-hh-mm-ss] ") + line + "<br>\n";
+
+    share->logMutex.unlock();
 }
 
 void enforceMaxLogSize(const QString &filePath, shared_t *share)