diff --git a/CMakeLists.txt b/CMakeLists.txt
index d3ee6212..b2196e4e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -57,9 +57,9 @@ endif()
 if(WIN32)
 # On Windows/MinGW the we need to use 'thread_win32' instead of 'thread'.
 # The library is named libboost_thread_win32* (not libboost_thread*).
-find_package(Boost 1.46 COMPONENTS system thread_win32)
+find_package(Boost 1.45 COMPONENTS system thread_win32)
 else()
-find_package(Boost 1.46 COMPONENTS system thread)
+find_package(Boost 1.45 COMPONENTS system thread)
 endif()
 
 #===============================================================================
diff --git a/README b/README
index b942c340..210b8c36 100644
--- a/README
+++ b/README
@@ -31,7 +31,7 @@ Requirements
  - cmake >= 2.6
  - libglib >= 2.28.0
  - Qt >= 4.5
- - libboost >= 1.46 (including the following libs):
+ - libboost >= 1.45 (including the following libs):
     - libboost-system
     - libboost-thread
  - libsigrok >= 0.2.0