diff --git a/aegisub/configure.ac b/aegisub/configure.ac
index 22f4df798..9b1ecd0e0 100644
--- a/aegisub/configure.ac
+++ b/aegisub/configure.ac
@@ -3,7 +3,7 @@ AC_PREREQ(2.57)
 ###################
 # Required packages
 ###################
-m4_define([boost_required_version], [1.50.0])
+m4_define([boost_required_version], [1.49.0])
 m4_define([curl_required_version], [7.18.2])
 m4_define([ffms2_required_version], [2.16])
 m4_define([fftw3_required_version], [3.3])
diff --git a/aegisub/libaegisub/common/calltip_provider.cpp b/aegisub/libaegisub/common/calltip_provider.cpp
index b3272e688..545c2e6cb 100644
--- a/aegisub/libaegisub/common/calltip_provider.cpp
+++ b/aegisub/libaegisub/common/calltip_provider.cpp
@@ -116,7 +116,7 @@ CalltipProvider::CalltipProvider() {
 		if (proto.has_parens)
 			p.text.back() = ')';
 
-		protos.emplace(std::move(tag_name), std::move(p));
+		protos.insert(make_pair(tag_name, p));
 	}
 }
 
diff --git a/aegisub/libaegisub/common/charset_ucd.cpp b/aegisub/libaegisub/common/charset_ucd.cpp
index 0cf6886f1..cc96f1151 100644
--- a/aegisub/libaegisub/common/charset_ucd.cpp
+++ b/aegisub/libaegisub/common/charset_ucd.cpp
@@ -23,8 +23,6 @@
 
 #include "../../universalchardet/nsCharSetProber.h"
 
-#include <boost/range/algorithm.hpp>
-
 namespace agi {
 	namespace charset {
 
@@ -97,7 +95,7 @@ UCDetect::UCDetect(const std::string &file)
 			throw UnknownCharset("Unknown character set.");
 
 		typedef std::pair<float, std::string> const& result;
-		boost::sort(list, [](result lft, result rgt) { return lft.first > rgt.first; });
+		sort(begin(list), end(list), [](result lft, result rgt) { return lft.first > rgt.first; });
 	}
 }
 
diff --git a/aegisub/libaegisub/common/thesaurus.cpp b/aegisub/libaegisub/common/thesaurus.cpp
index 511fe9534..dfbfc9020 100644
--- a/aegisub/libaegisub/common/thesaurus.cpp
+++ b/aegisub/libaegisub/common/thesaurus.cpp
@@ -71,7 +71,8 @@ void Thesaurus::Lookup(std::string const& word, std::vector<Entry> *out) {
 	std::string temp;
 	getline(*dat, temp);
 	std::vector<std::string> header;
-	boost::split(header, conv->Convert(temp), _1 == '|');
+	std::string converted(conv->Convert(temp));
+	boost::split(header, converted, _1 == '|');
 	if (header.size() != 2) return;
 	int meanings = atoi(header[1].c_str());
 
@@ -79,7 +80,8 @@ void Thesaurus::Lookup(std::string const& word, std::vector<Entry> *out) {
 	for (int i = 0; i < meanings; ++i) {
 		std::vector<std::string> line;
 		getline(*dat, temp);
-		boost::split(line, conv->Convert(temp), _1 == '|');
+		std::string converted(conv->Convert(temp));
+		boost::split(line, converted, _1 == '|');
 
 		// The "definition" is just the part of speech plus the word it's
 		// giving synonyms for (which may not be the passed word)
diff --git a/aegisub/src/dialog_autosave.cpp b/aegisub/src/dialog_autosave.cpp
index 9e55e81c3..0ada2aa45 100644
--- a/aegisub/src/dialog_autosave.cpp
+++ b/aegisub/src/dialog_autosave.cpp
@@ -112,7 +112,7 @@ void DialogAutosave::Populate(std::map<wxString, AutosaveFile> &files_map, std::
 
 		auto it = files_map.find(name);
 		if (it == files_map.end())
-			it = files_map.emplace(name, name).first;
+			it = files_map.insert(std::make_pair(name, name)).first;
 		it->second.versions.emplace_back(wxFileName(directory, fn).GetFullPath(), date, wxString::Format(name_fmt, date.Format()));
 	} while (dir.GetNext(&fn));
 }
diff --git a/aegisub/src/dialog_spellchecker.cpp b/aegisub/src/dialog_spellchecker.cpp
index f0050dad1..5cb6f20b6 100644
--- a/aegisub/src/dialog_spellchecker.cpp
+++ b/aegisub/src/dialog_spellchecker.cpp
@@ -180,7 +180,7 @@ void DialogSpellChecker::OnIgnore(wxCommandEvent&) {
 }
 
 void DialogSpellChecker::OnIgnoreAll(wxCommandEvent&) {
-	auto_ignore.emplace(from_wx(orig_word->GetValue()));
+	auto_ignore.insert(from_wx(orig_word->GetValue()));
 	FindNext();
 }