diff --git a/src/HTMLRenderer/export.cc b/src/HTMLRenderer/export.cc
index 0581815..fbc138e 100644
--- a/src/HTMLRenderer/export.cc
+++ b/src/HTMLRenderer/export.cc
@@ -8,15 +8,12 @@
  */
 
 #include <sstream>
-
-#include <boost/algorithm/string.hpp>
+#include <cctype>
 
 #include "HTMLRenderer.h"
 #include "namespace.h"
 #include "config.h"
 
-using boost::algorithm::ifind_first;
-
 void HTMLRenderer::export_remote_font(const FontInfo & info, const string & suffix, const string & fontfileformat, GfxFont * font) 
 {
     allcss_fout << "@font-face{font-family:f" << info.id << ";src:url(";
@@ -57,12 +54,16 @@ void HTMLRenderer::export_local_font(const FontInfo & info, GfxFont * font, cons
     allcss_fout << ".f" << info.id << "{";
     allcss_fout << "font-family:" << ((cssfont == "") ? (original_font_name + "," + general_font_family(font)) : cssfont) << ";";
 
-    if(font->isBold() || ifind_first(original_font_name, "bold"))
+    string fn = original_font_name;
+    for(auto iter = fn.begin(); iter != fn.end(); ++iter)
+        *iter = tolower(*iter);
+
+    if(font->isBold() || (fn.find("bold") != string::npos))
         allcss_fout << "font-weight:bold;";
 
-    if(ifind_first(original_font_name, "oblique"))
+    if(fn.find("oblique") != string::npos)
         allcss_fout << "font-style:oblique;";
-    else if(font->isItalic() || ifind_first(original_font_name, "italic"))
+    else if(font->isItalic() || (fn.find("italic") != string::npos))
         allcss_fout << "font-style:italic;";
 
     allcss_fout << "line-height:" << (info.ascent - info.descent) << ";";
diff --git a/src/HTMLRenderer/image.cc b/src/HTMLRenderer/image.cc
index 22f905c..21afa24 100644
--- a/src/HTMLRenderer/image.cc
+++ b/src/HTMLRenderer/image.cc
@@ -7,18 +7,9 @@
  * 2012.08.14
  */
 
-#if 0
-// for gil bug
-const int *int_p_NULL = nullptr;
-#include <boost/gil/gil_all.hpp>
-#include <boost/gil/extension/io/png_dynamic_io.hpp>
-#endif
-
 #include "HTMLRenderer.h"
 #include "namespace.h"
 
-//using namespace boost::gil;
-
 void HTMLRenderer::drawImage(GfxState * state, Object * ref, Stream * str, int width, int height, GfxImageColorMap * colorMap, GBool interpolate, int *maskColors, GBool inlineImg)
 {
     return OutputDev::drawImage(state,ref,str,width,height,colorMap,interpolate,maskColors,inlineImg);