diff --git a/zephcore/app/CompanionMesh.cpp b/zephcore/app/CompanionMesh.cpp
index 247ee5d..088944a 100644
--- a/zephcore/app/CompanionMesh.cpp
+++ b/zephcore/app/CompanionMesh.cpp
@@ -2233,7 +2233,7 @@ bool CompanionMesh::handleProtocolFrame(const uint8_t *data, size_t len)
 				"CONFIG_ZEPHCORE_BOARD_NAME must fit in 40 bytes including null terminator");
 			static const uint8_t fw_build[12] = FIRMWARE_BUILD_DATE;
 			static const uint8_t model[40] = CONFIG_ZEPHCORE_BOARD_NAME;
-			static const uint8_t version[20] = "v1.15.6-zephyr";
+			static const uint8_t version[20] = "v1.15.9-zephyr";
 			uint8_t rsp[82];
 			rsp[0] = PACKET_DEVICE_INFO;
 			rsp[1] = 12;  // FIRMWARE_VER_CODE - v12 = CMD_SET_FLOOD_SCOPE_KEY [0x36, 0x01] unscoped variant
diff --git a/zephcore/app/ObserverMesh.h b/zephcore/app/ObserverMesh.h
index 4691744..689a800 100644
--- a/zephcore/app/ObserverMesh.h
+++ b/zephcore/app/ObserverMesh.h
@@ -19,7 +19,7 @@
 #include "observer_creds.h"
 
 #ifndef FIRMWARE_VERSION
-  #define FIRMWARE_VERSION   "v1.15.6-zephyr"
+  #define FIRMWARE_VERSION   "v1.15.9-zephyr"
 #endif
 
 #ifndef FIRMWARE_BUILD_DATE
diff --git a/zephcore/app/RepeaterMesh.h b/zephcore/app/RepeaterMesh.h
index 9f1bfc4..cc75090 100644
--- a/zephcore/app/RepeaterMesh.h
+++ b/zephcore/app/RepeaterMesh.h
@@ -28,7 +28,7 @@
 #endif
 
 #ifndef FIRMWARE_VERSION
-  #define FIRMWARE_VERSION   "v1.15.6-zephyr"
+  #define FIRMWARE_VERSION   "v1.15.9-zephyr"
 #endif
 
 #ifndef FIRMWARE_BUILD_DATE
diff --git a/zephcore/app/RoomServerMesh.h b/zephcore/app/RoomServerMesh.h
index 02e9827..2baf269 100644
--- a/zephcore/app/RoomServerMesh.h
+++ b/zephcore/app/RoomServerMesh.h
@@ -27,7 +27,7 @@
 #include "RepeaterDataStore.h"
 
 #ifndef FIRMWARE_VERSION
-  #define FIRMWARE_VERSION   "v1.15.6-zephyr"
+  #define FIRMWARE_VERSION   "v1.15.9-zephyr"
 #endif
 
 #ifndef FIRMWARE_BUILD_DATE
diff --git a/zephcore/boards/common/zephcore_common.conf b/zephcore/boards/common/zephcore_common.conf
index 4cc94ee..26747d8 100644
--- a/zephcore/boards/common/zephcore_common.conf
+++ b/zephcore/boards/common/zephcore_common.conf
@@ -148,9 +148,9 @@ CONFIG_BT_DIS_MODEL_NUMBER=y
 CONFIG_BT_DIS_MODEL_NUMBER_STR="ZephCore"
 CONFIG_BT_DIS_FW_REV=y
 # Keep in sync with the version string in CompanionMesh.cpp CMD_DEVICE_QUERY
-# response (the v1.15.6-zephyr literal). Phones that read DIS and phones
+# response (the v1.15.9-zephyr literal). Phones that read DIS and phones
 # that query CMD_DEVICE_QUERY should see the same version.
-CONFIG_BT_DIS_FW_REV_STR="v1.15.6-zephyr"
+CONFIG_BT_DIS_FW_REV_STR="v1.15.9-zephyr"
 CONFIG_BT_DIS_SW_REV=y
 CONFIG_BT_DIS_SW_REV_STR="Zephyr"
 CONFIG_BT_DIS_PNP=n
diff --git a/zephcore/src/main_companion.cpp b/zephcore/src/main_companion.cpp
index 1057ef8..899cba9 100644
--- a/zephcore/src/main_companion.cpp
+++ b/zephcore/src/main_companion.cpp
@@ -581,7 +581,7 @@ public:
 	void savePrefs() override {
 		data_store.savePrefs(companion_mesh.prefs);
 	}
-	const char* getFirmwareVer() override { return "v1.15.6-zephyr"; }
+	const char* getFirmwareVer() override { return "v1.15.9-zephyr"; }
 	const char* getBuildDate() override { return FIRMWARE_BUILD_DATE; }
 	const char* getRole() override { return "companion"; }
 	bool formatFileSystem() override { return data_store.formatFileSystem(); }