diff --git a/CMakeLists.txt b/CMakeLists.txt
index ba692ff..fc2edff 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -65,6 +65,7 @@ include(GNUInstallDirs)
 include(CMakePackageConfigHelpers)
 
 option(BUILD_SHARED_LIBS  "Default to building shared libraries" ON)
+option(BUILD_STATIC_LIBS  "Default to building static libraries" OFF)
 
 # Generate a release merge and test it to verify the correctness of republishing the package.
 ADD_CUSTOM_TARGET(distcheck
@@ -383,7 +384,7 @@ add_library(${PROJECT_NAME}
 set_target_properties(${PROJECT_NAME} PROPERTIES
     VERSION 5.0.0
     SOVERSION 5)
-
+list(APPEND CMAKE_TARGETS ${PROJECT_NAME})
 # If json-c is used as subroject it set to target correct interface -I flags and allow
 # to build external target without extra include_directories(...)
 target_include_directories(${PROJECT_NAME}
@@ -392,7 +393,33 @@ target_include_directories(${PROJECT_NAME}
         $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>
 )
 
-install(TARGETS ${PROJECT_NAME}
+# Allow to build static and shared libraries at the same time
+if (BUILD_STATIC_LIBS)
+    set(STATIC_LIB ${PROJECT_NAME}-static)
+    add_library(${STATIC_LIB} STATIC
+        ${JSON_C_SOURCES}
+        ${JSON_C_HEADERS}
+    )
+
+    # rename the static library
+    set_target_properties(${STATIC_LIB} PROPERTIES
+        OUTPUT_NAME ${PROJECT_NAME}
+    )
+    list(APPEND CMAKE_TARGETS ${STATIC_LIB})
+endif ()
+
+# Always create new install dirs with 0755 permissions, regardless of umask
+set(CMAKE_INSTALL_DEFAULT_DIRECTORY_PERMISSIONS
+	OWNER_READ
+	OWNER_WRITE
+	OWNER_EXECUTE
+	GROUP_READ
+	GROUP_EXECUTE
+	WORLD_READ
+	WORLD_EXECUTE
+   )
+
+install(TARGETS ${CMAKE_TARGETS}
     EXPORT ${PROJECT_NAME}-targets
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}