diff --git a/osmpbf/CMakeLists.txt b/osmpbf/CMakeLists.txt
index 5f2376c..41f3c2a 100644
--- a/osmpbf/CMakeLists.txt
+++ b/osmpbf/CMakeLists.txt
@@ -2,9 +2,11 @@ protobuf_generate_cpp(CPPS HS fileformat.proto osmformat.proto)
 
 add_library(osmpbf STATIC ${CPPS})
 target_include_directories(osmpbf SYSTEM PUBLIC ${Protobuf_INCLUDE_DIRS})
+set_property(TARGET osmpbf PROPERTY CXX_STANDARD 11)
 install(TARGETS osmpbf ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
 
 add_library(osmpbf_shared SHARED ${CPPS})
+set_property(TARGET osmpbf_shared PROPERTY CXX_STANDARD 11)
 target_link_libraries(osmpbf_shared PRIVATE protobuf::libprotobuf)
 target_include_directories(osmpbf_shared SYSTEM PUBLIC ${Protobuf_INCLUDE_DIRS})
 set_target_properties(osmpbf_shared PROPERTIES OUTPUT_NAME osmpbf
diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index e1e2c6c..c7e7002 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -10,6 +10,7 @@ add_executable(osmpbf-outline osmpbf-outline.cpp)
 
 target_include_directories(osmpbf-outline SYSTEM PRIVATE ${ZLIB_INCLUDE_DIR})
 target_link_libraries(osmpbf-outline PRIVATE osmpbf ZLIB::ZLIB protobuf::libprotobuf)
+set_property(TARGET osmpbf-outline PROPERTY CXX_STANDARD 11)
 
 install(TARGETS osmpbf-outline RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
 install(FILES osmpbf-outline.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)