diff --git a/auto_firmware_version.py b/auto_firmware_version.py
new file mode 100644
index 0000000..9d6a8ae
--- /dev/null
+++ b/auto_firmware_version.py
@@ -0,0 +1,22 @@
+import pkg_resources
+
+Import("env")
+
+required_pkgs = {'dulwich'}
+installed_pkgs = {pkg.key for pkg in pkg_resources.working_set}
+missing_pkgs = required_pkgs - installed_pkgs
+
+if missing_pkgs:
+    env.Execute('$PYTHONEXE -m pip install dulwich --global-option="--pure"')
+
+from dulwich import porcelain
+
+def get_firmware_specifier_build_flag():
+    build_version = porcelain.describe('.')  # '.' refers to the repository root dir
+    build_flag = "-D AUTO_GIT_HASH=\\\"" + build_version + "\\\""
+    print ("Firmware Revision: " + build_version)
+    return (build_flag)
+
+env.Append(
+    BUILD_FLAGS=[get_firmware_specifier_build_flag()]
+)
\ No newline at end of file
diff --git a/platformio.ini b/platformio.ini
index db2d053..84645fa 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -28,6 +28,9 @@ lib_deps =
     https://github.com/marvinroger/async-mqtt-client.git
     nrf24/RF24 @ ^1.4.2
 
+extra_scripts =
+    pre:auto_firmware_version.py
+
 board = esp32dev
 board_build.partitions = partitions_custom.csv
 board_build.filesystem = littlefs
diff --git a/src/WebApi_sysstatus.cpp b/src/WebApi_sysstatus.cpp
index 65175e9..bf57579 100644
--- a/src/WebApi_sysstatus.cpp
+++ b/src/WebApi_sysstatus.cpp
@@ -5,6 +5,10 @@
 #include <LittleFS.h>
 #include <ResetReason.h>
 
+#ifndef AUTO_GIT_HASH
+#define AUTO_GIT_HASH ""
+#endif
+
 void WebApiSysstatusClass::init(AsyncWebServer* server)
 {
     using namespace std::placeholders;
@@ -51,6 +55,7 @@ void WebApiSysstatusClass::onSystemStatus(AsyncWebServerRequest* request)
     char version[16];
     sprintf(version, "%d.%d.%d", CONFIG_VERSION >> 24 & 0xff, CONFIG_VERSION >> 16 & 0xff, CONFIG_VERSION >> 8 & 0xff);
     root[F("firmware_version")] = version;
+    root[F("git_hash")] = AUTO_GIT_HASH;
 
     root[F("uptime")] = esp_timer_get_time() / 1000000;
 
diff --git a/webapp/src/components/partials/FirmwareInfo.vue b/webapp/src/components/partials/FirmwareInfo.vue
index e487777..709b50a 100644
--- a/webapp/src/components/partials/FirmwareInfo.vue
+++ b/webapp/src/components/partials/FirmwareInfo.vue
@@ -19,6 +19,10 @@
               <th>Firmware Version</th>
               <td>{{ systemDataList.firmware_version }}</td>
             </tr>
+            <tr>
+              <th>Git Hash</th>
+              <td>{{ systemDataList.git_hash }}</td>
+            </tr>
             <tr>
               <th>Reset Reason CPU 0</th>
               <td>{{ systemDataList.resetreason_0 }}</td>