diff --git a/CMakeLists.txt b/CMakeLists.txt
index fdaa2f1..c56fb77 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -179,6 +179,9 @@
     execute_process(COMMAND ${CMAKE_C_COMPILER} -dumpversion
                     OUTPUT_VARIABLE GCC_VERSION)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wwrite-strings")
+    if (GCC_VERSION VERSION_GREATER 3.0 OR GCC_VERSION VERSION_EQUAL 3.0)
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wformat=2 -Wno-format-nonliteral")
+    endif()
     if (GCC_VERSION VERSION_GREATER 4.3 OR GCC_VERSION VERSION_EQUAL 4.3)
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wvla")
     endif()
@@ -194,6 +197,10 @@
             set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wformat-signedness")
         endif()
     endif()
+    if (GCC_VERSION VERSION_GREATER 7.0 OR GCC_VERSION VERSION_EQUAL 7.0)
+      # Cannot use -Wformat-truncation=2 as this fails on mbedtls_snprintf (unknown buffer size)
+      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wformat-overflow=2 -Wformat-truncation")
+    endif()
     set(CMAKE_C_FLAGS_RELEASE     "-O2")
     set(CMAKE_C_FLAGS_DEBUG       "-O0 -g3")
     set(CMAKE_C_FLAGS_COVERAGE    "-O0 -g3 --coverage")
@@ -204,7 +211,7 @@
 endif(CMAKE_COMPILER_IS_GNU)
 
 if(CMAKE_COMPILER_IS_CLANG)
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wwrite-strings -Wpointer-arith -Wimplicit-fallthrough -Wshadow -Wvla")
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wwrite-strings -Wpointer-arith -Wimplicit-fallthrough -Wshadow -Wvla -Wformat=2 -Wno-format-nonliteral")
     set(CMAKE_C_FLAGS_RELEASE     "-O2")
     set(CMAKE_C_FLAGS_DEBUG       "-O0 -g3")
     set(CMAKE_C_FLAGS_COVERAGE    "-O0 -g3 --coverage")