diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3aff31c87..0fbd8a82f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -18,7 +18,7 @@
 # Boston, MA 02110-1301, USA.
 #
 
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.16)
 cmake_policy(SET CMP0005 NEW)
 
 set(CMAKE_TOOLCHAIN_FILE ${CMAKE_CURRENT_LIST_DIR}/firmware/toolchain-arm-cortex-m.cmake)
diff --git a/firmware/CMakeLists.txt b/firmware/CMakeLists.txt
index bc613db18..161be343b 100644
--- a/firmware/CMakeLists.txt
+++ b/firmware/CMakeLists.txt
@@ -18,7 +18,7 @@
 # Boston, MA 02110-1301, USA.
 #
 
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.16)
 
 project(firmware)
 
diff --git a/firmware/chibios-portapack/ext/fatfs/src/ff.c b/firmware/chibios-portapack/ext/fatfs/src/ff.c
index 862f0a56f..960d7af2a 100644
--- a/firmware/chibios-portapack/ext/fatfs/src/ff.c
+++ b/firmware/chibios-portapack/ext/fatfs/src/ff.c
@@ -1060,6 +1060,7 @@ DWORD get_fat (	/* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluste
 				}
 			}
 			/* go to default */
+            __attribute__ ((fallthrough));
 #endif
 		default:
 			val = 1;	/* Internal error */
diff --git a/firmware/standalone/CMakeLists.txt b/firmware/standalone/CMakeLists.txt
index ea1dd0fd1..e6e603d5c 100644
--- a/firmware/standalone/CMakeLists.txt
+++ b/firmware/standalone/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.16)
 
 project(standalone_apps)