diff --git a/src/HTMLRenderer/HTMLRenderer.h b/src/HTMLRenderer/HTMLRenderer.h
index 89d3d1e..4956588 100644
--- a/src/HTMLRenderer/HTMLRenderer.h
+++ b/src/HTMLRenderer/HTMLRenderer.h
@@ -168,7 +168,6 @@ class HTMLRenderer : public OutputDev
         long long install_fill_color(const GfxRGB * rgb);
         long long install_stroke_color(const GfxRGB * rgb);
         long long install_whitespace(double ws_width, double & actual_width);
-        long long install_rise(double rise);
         long long install_height(double height);
         long long install_left(double left);
 
@@ -187,7 +186,6 @@ class HTMLRenderer : public OutputDev
         void export_fill_color(long long color_id, const GfxRGB * rgb);
         void export_stroke_color(long long color_id, const GfxRGB * rgb);
         void export_whitespace(long long ws_id, double ws_width);
-        void export_rise(long long rise_id, double rise);
         void export_height(long long height_id, double height);
         void export_left(long long left_id, double left);
 
@@ -319,9 +317,8 @@ class HTMLRenderer : public OutputDev
         bool stroke_color_changed;
 
         // rise
-        long long cur_rise_id;
-        double cur_rise;
         bool rise_changed;
+        RiseManager rise_manager;
 
         // optimize for web
         // we try to render the final font size directly
@@ -359,11 +356,9 @@ class HTMLRenderer : public OutputDev
         ////////////////////////////////////////////////////
 
         std::unordered_map<long long, FontInfo> font_name_map;
-        std::map<double, long long> font_size_map;
         std::map<Matrix, long long, Matrix_less> transform_matrix_map;
         std::unordered_map<GfxRGB, long long, GfxRGB_hash, GfxRGB_equal> fill_color_map, stroke_color_map; 
         std::map<double, long long> whitespace_map;
-        std::map<double, long long> rise_map;
         std::map<double, long long> height_map;
         std::map<double, long long> left_map;
 
diff --git a/src/HTMLRenderer/TextLineBuffer.cc b/src/HTMLRenderer/TextLineBuffer.cc
index f0fc599..9a00f07 100644
--- a/src/HTMLRenderer/TextLineBuffer.cc
+++ b/src/HTMLRenderer/TextLineBuffer.cc
@@ -190,7 +190,7 @@ void HTMLRenderer::TextLineBuffer::set_state (State & state)
     state.ids[State::STROKE_COLOR_ID] = renderer->cur_stroke_color_id;
     state.ids[State::LETTER_SPACE_ID] = renderer->letter_space_manager.get_id();
     state.ids[State::WORD_SPACE_ID] = renderer->word_space_manager.get_id();
-    state.ids[State::RISE_ID] = renderer->cur_rise_id;
+    state.ids[State::RISE_ID] = renderer->rise_manager.get_id();
 
     const FontInfo * info = renderer->cur_font_info;
     state.ascent = info->ascent;
diff --git a/src/HTMLRenderer/export.cc b/src/HTMLRenderer/export.cc
index 742dd68..6332df9 100644
--- a/src/HTMLRenderer/export.cc
+++ b/src/HTMLRenderer/export.cc
@@ -196,11 +196,6 @@ void HTMLRenderer::export_whitespace (long long ws_id, double ws_width)
         f_css.fs << "._" << ws_id << "{display:inline;margin-left:" << round(ws_width) << "px;}" << endl;
 }
 
-void HTMLRenderer::export_rise (long long rise_id, double rise) 
-{
-    f_css.fs << ".r" << rise_id << "{top:" << round(-rise) << "px;}" << endl;
-}
-
 void HTMLRenderer::export_height (long long height_id, double height) 
 {
     f_css.fs << ".h" << height_id << "{height:" << round(height) << "px;}" << endl;
diff --git a/src/HTMLRenderer/general.cc b/src/HTMLRenderer/general.cc
index 7bab35c..1b95fdf 100644
--- a/src/HTMLRenderer/general.cc
+++ b/src/HTMLRenderer/general.cc
@@ -56,9 +56,10 @@ HTMLRenderer::HTMLRenderer(const Param * param)
     cur_mapping2 = new char* [0x100];
     width_list = new int [0x10000];
 
-    font_size_manager   .set_param(CSS::FONT_SIZE_CN   , EPS);
-    letter_space_manager.set_param(CSS::LETTER_SPACE_CN, EPS);
-    word_space_manager  .set_param(CSS::WORD_SPACE_CN  , EPS);
+    font_size_manager   .set_param(CSS::FONT_SIZE_CN   , EPS         );
+    letter_space_manager.set_param(CSS::LETTER_SPACE_CN, EPS         );
+    word_space_manager  .set_param(CSS::WORD_SPACE_CN  , EPS         );
+    rise_manager        .set_param(CSS::RISE_CN        , param->v_eps);
 }
 
 HTMLRenderer::~HTMLRenderer()
@@ -339,6 +340,7 @@ void HTMLRenderer::post_process()
     font_size_manager   .dump_css(f_css.fs);
     letter_space_manager.dump_css(f_css.fs);
     word_space_manager  .dump_css(f_css.fs);
+    rise_manager        .dump_css(f_css.fs);
 
     // close files
     f_outline.fs.close();
diff --git a/src/HTMLRenderer/install.cc b/src/HTMLRenderer/install.cc
index fda5ae5..4b65151 100644
--- a/src/HTMLRenderer/install.cc
+++ b/src/HTMLRenderer/install.cc
@@ -280,20 +280,6 @@ long long HTMLRenderer::install_whitespace(double ws_width, double & actual_widt
     return new_ws_id;
 }
 
-long long HTMLRenderer::install_rise(double rise)
-{
-    auto iter = rise_map.lower_bound(rise - param->v_eps);
-    if((iter != rise_map.end()) && (abs(iter->first - rise) <= param->v_eps))
-    {
-        return iter->second;
-    }
-
-    long long new_rise_id = rise_map.size();
-    rise_map.insert(make_pair(rise, new_rise_id));
-    export_rise(new_rise_id, rise);
-    return new_rise_id;
-}
-
 long long HTMLRenderer::install_height(double height)
 {
     auto iter = height_map.lower_bound(height - EPS);
diff --git a/src/HTMLRenderer/state.cc b/src/HTMLRenderer/state.cc
index dc6225e..d11f93f 100644
--- a/src/HTMLRenderer/state.cc
+++ b/src/HTMLRenderer/state.cc
@@ -116,8 +116,7 @@ void HTMLRenderer::reset_state()
     cur_stroke_color_id = install_stroke_color(&cur_stroke_color);
     cur_has_stroke = false;
 
-    cur_rise = 0;
-    cur_rise_id = install_rise(cur_rise);
+    rise_manager.reset();
 
     cur_tx = cur_ty = 0;
     draw_tx = draw_ty = 0;
@@ -408,15 +407,10 @@ void HTMLRenderer::check_state_change(GfxState * state)
 
     // rise
     // depends draw_text_scale
-    if(all_changed || rise_changed || draw_text_scale_changed)
+    if((all_changed || rise_changed || draw_text_scale_changed)
+        && (rise_manager.install(state->getRise() * draw_text_scale)))
     {
-        double new_rise = state->getRise();
-        if(!equal(cur_rise, new_rise))
-        {
-            new_line_state = max<NewLineState>(new_line_state, NLS_SPAN);
-            cur_rise = new_rise;
-            cur_rise_id = install_rise(new_rise * draw_text_scale);
-        }
+        new_line_state = max<NewLineState>(new_line_state, NLS_SPAN);
     }
 
     reset_state_change();
diff --git a/src/util/StateManager.h b/src/util/StateManager.h
index 2f98019..edb582a 100644
--- a/src/util/StateManager.h
+++ b/src/util/StateManager.h
@@ -114,6 +114,13 @@ public:
     void dump_value(std::ostream & out, double value) { out << "word-spacing:" << round(value) << "px;"; }
 };
 
+class RiseManager : public StateManager<double, RiseManager>
+{
+public:
+    double default_value(void) { return 0; }
+    void dump_value(std::ostream & out, double value) { out << "top:" << round(-value) << "px;"; }
+};
+
 } // namespace pdf2htmlEX 
 
 #endif //STATEMANAGER_H__