diff --git a/CMakeLists.txt b/CMakeLists.txt
index fb81e52..461493b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.12)
 
 PROJECT(ledgebase)
 
diff --git a/cmake/Modules/FindCryptoPP.cmake b/cmake/Modules/FindCryptoPP.cmake
index 50ff473..de2d2af 100644
--- a/cmake/Modules/FindCryptoPP.cmake
+++ b/cmake/Modules/FindCryptoPP.cmake
@@ -27,9 +27,9 @@ FIND_LIBRARY (CRYPTOPP_LIBRARY_RELEASE
 IF (CRYPTOPP_LIBRARY_DEBUG AND CRYPTOPP_LIBRARY_RELEASE)
   SET (CRYPTOPP_LIBRARY
     optimized ${CRYPTOPP_LIBRARY_RELEASE}
-    debug ${CRYPTOPP_LIBRARY_DEBUG} CACHE DOC "CryptoPP library")
+    debug ${CRYPTOPP_LIBRARY_DEBUG} CACHE STRING "CryptoPP library")
 ELSEIF (CRYPTOPP_LIBRARY_RELEASE)
-  SET (CRYPTOPP_LIBRARY ${CRYPTOPP_LIBRARY_RELEASE} CACHE DOC
+  SET (CRYPTOPP_LIBRARY ${CRYPTOPP_LIBRARY_RELEASE} CACHE STRING
     "CryptoPP library")
 ENDIF (CRYPTOPP_LIBRARY_DEBUG AND CRYPTOPP_LIBRARY_RELEASE)
 
@@ -42,14 +42,14 @@ IF (CRYPTOPP_INCLUDE_DIR)
 
     STRING (REGEX REPLACE
       "^#define CRYPTOPP_VERSION[ \t]+([0-9]+)" "\\1" _CRYPTOPP_VERSION_TMP
-      ${_CRYPTOPP_VERSION_TMP})
+      "${_CRYPTOPP_VERSION_TMP}")
 
     STRING (REGEX REPLACE "([0-9]+)[0-9][0-9]" "\\1" CRYPTOPP_VERSION_MAJOR
-      ${_CRYPTOPP_VERSION_TMP})
+      "${_CRYPTOPP_VERSION_TMP}")
     STRING (REGEX REPLACE "[0-9]([0-9])[0-9]" "\\1" CRYPTOPP_VERSION_MINOR
-      ${_CRYPTOPP_VERSION_TMP})
+      "${_CRYPTOPP_VERSION_TMP}")
     STRING (REGEX REPLACE "[0-9][0-9]([0-9])" "\\1" CRYPTOPP_VERSION_PATCH
-      ${_CRYPTOPP_VERSION_TMP})
+      "${_CRYPTOPP_VERSION_TMP}")
 
     SET (CRYPTOPP_VERSION_COUNT 3)
     SET (CRYPTOPP_VERSION
diff --git a/cmake/Modules/FindLibEvent.cmake b/cmake/Modules/FindLibEvent.cmake
index 3b3290f..3f3dfb0 100644
--- a/cmake/Modules/FindLibEvent.cmake
+++ b/cmake/Modules/FindLibEvent.cmake
@@ -17,7 +17,7 @@ set (LIBEVENT_LIBRARIES
         ${LIBEVENT_EXTRA}
         ${LIBEVENT_THREAD}
         ${LIBEVENT_EXTRA})
-    find_package_handle_standard_args (LIBEVENT DEFAULT_MSG LIBEVENT_LIBRARIES LIBEVENT_INCLUDE_DIR)
+    find_package_handle_standard_args (LibEvent DEFAULT_MSG LIBEVENT_LIBRARIES LIBEVENT_INCLUDE_DIR)
 mark_as_advanced(LIBEVENT_INCLUDE_DIRS LIBEVENT_LIBRARIES)
 
 if (LIBEVENT_FOUND)
diff --git a/cmake/Modules/FindRocksdb.cmake b/cmake/Modules/FindRocksdb.cmake
index bd78651..4301d30 100644
--- a/cmake/Modules/FindRocksdb.cmake
+++ b/cmake/Modules/FindRocksdb.cmake
@@ -3,7 +3,7 @@ FIND_PATH(ROCKSDB_INCLUDE_DIR NAMES rocksdb/db.h PATHS "$ENV{ROCKSDB_DIR}/includ
 FIND_LIBRARY(ROCKSDB_LIBRARIES NAMES rocksdb PATHS "$ENV{ROCKSDB_DIR}/lib")
 
 INCLUDE(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(ROCKSDB DEFAULT_MSG ROCKSDB_INCLUDE_DIR ROCKSDB_LIBRARIES)
+find_package_handle_standard_args(Rocksdb DEFAULT_MSG ROCKSDB_INCLUDE_DIR ROCKSDB_LIBRARIES)
 
 IF(ROCKSDB_FOUND)
     MESSAGE(STATUS "Found Rocksdb at ${ROCKSDB_INCLUDE_DIR}")