diff --git a/bin/pdf2htmlEX b/bin/pdf2htmlEX
index 8469cdc..a6e5682 100755
--- a/bin/pdf2htmlEX
+++ b/bin/pdf2htmlEX
@@ -1,6 +1,12 @@
 #!/bin/bash
 set -e
 
+TMPDIR=/tmp/pdf2htmlEX
+
+# prepare the temporary directory
+test -d $TMPDIR || mkdir -p $TMPDIR
+rm -f $TMPDIR/* 2>/dev/null
+
 # Get directory of the script
 SOURCE="${BASH_SOURCE[0]}"
 while [ -h "$SOURCE" ] ; do SOURCE="$(readlink "$SOURCE")"; done
@@ -8,13 +14,13 @@ SCRIPT_DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"/
 # Execute
 ${SCRIPT_DIR}/pdftohtmlEX $* 
 
-if [ -f convert.pe ]; then
+if [ -f $TMPDIR/convert.pe ]; then
     echo -n "Converting fonts: "
-    fontforge -script convert.pe 2>/dev/null
+    fontforge -script $TMPDIR/convert.pe 2>/dev/null
     echo "."
-#    rm convert.pe
 fi
 
-rm *.encoding 2>/dev/null
+#clean
+rm -f $TMPDIR/* 2>/dev/null
 
 echo "Done."
diff --git a/src/Consts.cc b/src/Consts.cc
index 87ee1cf..07abc62 100644
--- a/src/Consts.cc
+++ b/src/Consts.cc
@@ -9,7 +9,7 @@
 
 const double EPS = 1e-6;
 
-const char * HTML_HEAD = "<!DOCTYPE html>\n\
+const std::string HTML_HEAD = "<!DOCTYPE html>\n\
 <html><head>\
 <meta charset=\"utf-8\">\
 <style type=\"text/css\">\
@@ -64,7 +64,9 @@ function show_pages()\
 </script>\
 </head><body onload=\"show_pages();\"><div id=\"pdf-main\">";
 
-const char * HTML_TAIL = "</div></body></html>";
+const std::string HTML_TAIL = "</div></body></html>";
+
+const std::string TMP_DIR = "/tmp/pdf2htmlEX";
 
 const std::map<std::string, std::string> BASE_14_FONT_CSS_FONT_MAP({\
    { "Courier", "Courier,monospace" },\
@@ -83,3 +85,5 @@ const std::map<std::string, std::string> GB_ENCODED_FONT_NAME_MAP({\
     {"\xB7\xC2\xCB\xCE_GB2312", "SimFang"},\
     {"\xC1\xA5\xCA\xE9", "SimLi"},\
 });
+
+
diff --git a/src/Consts.h b/src/Consts.h
index 23fdc4c..dec0420 100644
--- a/src/Consts.h
+++ b/src/Consts.h
@@ -13,8 +13,10 @@
 
 extern const double EPS;
 
-extern const char * HTML_HEAD;
-extern const char * HTML_TAIL;
+extern const std::string HTML_HEAD;
+extern const std::string HTML_TAIL;
+
+extern const std::string TMP_DIR;
 
 extern const std::map<std::string, std::string> BASE_14_FONT_CSS_FONT_MAP;
 
diff --git a/src/HTMLRenderer.cc b/src/HTMLRenderer.cc
index 0529050..306f93c 100644
--- a/src/HTMLRenderer.cc
+++ b/src/HTMLRenderer.cc
@@ -50,7 +50,7 @@ HTMLRenderer::HTMLRenderer(const Param * param)
     :line_opened(false)
     ,html_fout(param->output_filename.c_str(), ofstream::binary)
     ,allcss_fout("all.css")
-    ,fontscript_fout("convert.pe")
+    ,fontscript_fout(TMP_DIR+"/convert.pe")
     ,param(param)
 {
     // install default font & size
@@ -438,7 +438,7 @@ void HTMLRenderer::install_embedded_font (GfxFont * font, long long fn_id)
             {
                 auto ctg = dynamic_cast<Gfx8BitFont*>(font)->getCodeToGIDMap(ttf);
                 auto ctu = font->getToUnicode();
-                ofstream map_fout((boost::format("f%|1$x|.encoding") % fn_id).str().c_str());
+                ofstream map_fout((boost::format("%2%/f%|1$x|.encoding") % fn_id % TMP_DIR).str().c_str());
 
                 for(int i = 0; i < 256; ++i)
                 {
@@ -455,7 +455,7 @@ void HTMLRenderer::install_embedded_font (GfxFont * font, long long fn_id)
                     }
                 }
 
-                fontscript_fout << boost::format("LoadEncodingFile(\"f%|1$x|.encoding\", \"f%|1$x|\")") % fn_id << endl;
+                fontscript_fout << boost::format("LoadEncodingFile(\"%2%/f%|1$x|.encoding\", \"f%|1$x|\")") % fn_id % TMP_DIR<< endl;
                 fontscript_fout << boost::format("Reencode(\"f%|1$x|\", 1)") % fn_id << endl;
 
                 ctu->decRefCnt();
