diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6995610..df284d3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -177,8 +177,9 @@ find_package(Boost REQUIRED COMPONENTS
 	iostreams
 	filesystem
 	date_time
-	system
 	program_options
+	OPTIONAL_COMPONENTS
+	system
 )
 list(APPEND LIBRARIES ${Boost_LIBRARIES})
 link_directories(${Boost_LIBRARY_DIRS})
diff --git a/README.md b/README.md
index 3a5e826..40a056f 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ Author: [Daniel Scharrer](https://constexpr.org/)
 * **liblzma** from [xz-utils](https://tukaani.org/xz/) *(optional)*
 * **iconv** (*optional*, either as part of the system libc, as is the case with [glibc](https://www.gnu.org/software/libc/) and [uClibc](https://uclibc.org/), or as a separate [libiconv](https://www.gnu.org/software/libiconv/))
 
-For Boost you will need the headers as well as the `iostreams`, `filesystem`, `date_time`, `system` and `program_options` libraries. Older Boost version may work but are not actively supported. The boost `iostreams` library needs to be build with zlib and bzip2 support.
+For Boost you will need the headers as well as the `iostreams`, `filesystem`, `date_time` and `program_options` libraries. Older Boost versions may work but are not actively supported. The boost `iostreams` library needs to be built with zlib and bzip2 support.
 
 While innoextract can be built without liblzma by manually setting `-DUSE_LZMA=OFF`, it is highly recommended and you won't be able to extract most installers created by newer Inno Setup versions without it.