diff --git a/aegisub/configure.in b/aegisub/configure.in
index bbd3aef39..744bfa2b3 100644
--- a/aegisub/configure.in
+++ b/aegisub/configure.in
@@ -27,7 +27,7 @@ m4_define([fontconfig_required_version], [2.4])
 m4_define([freetype_required_version], [9.7.0])
 m4_define([pkgconfig_required_version], [0.20])
 m4_define([wx_required_version], [2.9.0])
-m4_define([boost_required_version], [1.34])
+m4_define([boost_required_version], [1.39])
 
 
 #######
@@ -713,12 +713,12 @@ else
   with_provider_ffmpegsource="no"
 fi
 
-BOOST_REQUIRE([boost_required_version])
-BOOST_FIND_HEADER([boost/format.hpp], [found_boost="no"; with_provider_ffmpegsource="no"])
+#BOOST_REQUIRE([boost_required_version])
+#BOOST_FIND_HEADER([boost/format.hpp], [found_boost="no"; with_provider_ffmpegsource="no"])
 
-if test "$found_boost" = "no"; then
-  AC_MSG_WARN([Boost is required for FFmpegSource support.])
-fi
+#if test "$found_boost" = "no"; then
+#  AC_MSG_WARN([Boost is required for FFmpegSource support.])
+#fi
 
 AM_CONDITIONAL([HAVE_PROVIDER_FFMPEGSOURCE], [test "$with_provider_ffmpegsource" = "yes"])
 AC_SUBST(LIBPOSTPROC_LIBS)