diff --git a/lib/imgui b/lib/imgui
index df8a9c4..da3c433 160000
--- a/lib/imgui
+++ b/lib/imgui
@@ -1 +1 @@
-Subproject commit df8a9c49eb6d9f134411eeffa0441f561aec3967
+Subproject commit da3c4330c1c3822cdc59b0c38c7e3c16aa3ef78a
diff --git a/proj/cmake/Cinder-ImGuiConfig.cmake b/proj/cmake/Cinder-ImGuiConfig.cmake
index 6e129b2..0057c04 100644
--- a/proj/cmake/Cinder-ImGuiConfig.cmake
+++ b/proj/cmake/Cinder-ImGuiConfig.cmake
@@ -5,6 +5,7 @@ if( NOT TARGET Cinder-ImGui )
 	${IMGUI_ROOT_PATH}/src/CinderImGui.cpp
 	${IMGUI_ROOT_PATH}/lib/imgui/imgui.cpp
 	${IMGUI_ROOT_PATH}/lib/imgui/imgui_draw.cpp
+	${IMGUI_ROOT_PATH}/lib/imgui/imgui_widgets.cpp
 	)
 
   add_library( Cinder-ImGui ${IMGUI_SOURCES} )
diff --git a/proj/vc2015/Cinder-ImGui.vcxproj b/proj/vc2015/Cinder-ImGui.vcxproj
index 2b54280..f02d116 100644
--- a/proj/vc2015/Cinder-ImGui.vcxproj
+++ b/proj/vc2015/Cinder-ImGui.vcxproj
@@ -331,6 +331,7 @@
     <ClCompile Include="..\..\lib\imgui\imgui.cpp" />
     <ClCompile Include="..\..\lib\imgui\imgui_demo.cpp" />
     <ClCompile Include="..\..\lib\imgui\imgui_draw.cpp" />
+    <ClCompile Include="..\..\lib\imgui\imgui_widgets.cpp" />
     <ClCompile Include="..\..\src\CinderImGui.cpp" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
diff --git a/proj/vc2015/Cinder-ImGui.vcxproj.filters b/proj/vc2015/Cinder-ImGui.vcxproj.filters
index fe96abb..a6bf08c 100644
--- a/proj/vc2015/Cinder-ImGui.vcxproj.filters
+++ b/proj/vc2015/Cinder-ImGui.vcxproj.filters
@@ -47,5 +47,8 @@
     <ClCompile Include="..\..\lib\imgui\imgui_demo.cpp">
       <Filter>Source Files\ImGui</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\lib\imgui\imgui_widgets.cpp">
+      <Filter>Source Files\ImGui</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/samples/Basic/vc2015/Basic.vcxproj b/samples/Basic/vc2015/Basic.vcxproj
index 19b1096..84f8739 100644
--- a/samples/Basic/vc2015/Basic.vcxproj
+++ b/samples/Basic/vc2015/Basic.vcxproj
@@ -191,6 +191,7 @@
   <ItemGroup />
   <ItemGroup />
   <ItemGroup>
+    <ClCompile Include="..\..\..\lib\imgui\imgui_widgets.cpp" />
     <ClCompile Include="..\src\BasicApp.cpp" />
     <ClCompile Include="..\..\..\src\CinderImGui.cpp" />
     <ClCompile Include="..\..\..\lib\imgui\imgui.cpp" />
diff --git a/samples/Basic/vc2015/Basic.vcxproj.filters b/samples/Basic/vc2015/Basic.vcxproj.filters
index 627dc85..d244cf8 100644
--- a/samples/Basic/vc2015/Basic.vcxproj.filters
+++ b/samples/Basic/vc2015/Basic.vcxproj.filters
@@ -71,6 +71,9 @@
     <ClCompile Include="..\..\..\lib\imgui\imgui_demo.cpp">
       <Filter>Blocks\ImGui\lib\imgui</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\lib\imgui\imgui_widgets.cpp">
+      <Filter>Blocks\ImGui\lib\imgui</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\include\Resources.h">
@@ -82,4 +85,4 @@
       <Filter>Resource Files</Filter>
     </ResourceCompile>
   </ItemGroup>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/src/CinderImGui.cpp b/src/CinderImGui.cpp
index 69322d5..2ad4a51 100644
--- a/src/CinderImGui.cpp
+++ b/src/CinderImGui.cpp
@@ -281,9 +281,6 @@ ImGui::Options& ImGui::Options::darkTheme()
 	style.Colors[ImGuiCol_ResizeGrip]            = ImVec4(0.47f, 0.77f, 0.83f, 0.04f);
 	style.Colors[ImGuiCol_ResizeGripHovered]     = ImVec4(0.92f, 0.18f, 0.29f, 0.78f);
 	style.Colors[ImGuiCol_ResizeGripActive]      = ImVec4(0.92f, 0.18f, 0.29f, 1.00f);
-	style.Colors[ImGuiCol_CloseButton]           = ImVec4(0.86f, 0.93f, 0.89f, 0.16f);
-	style.Colors[ImGuiCol_CloseButtonHovered]    = ImVec4(0.86f, 0.93f, 0.89f, 0.39f);
-	style.Colors[ImGuiCol_CloseButtonActive]     = ImVec4(0.86f, 0.93f, 0.89f, 1.00f);
 	style.Colors[ImGuiCol_PlotLines]             = ImVec4(0.86f, 0.93f, 0.89f, 0.63f);
 	style.Colors[ImGuiCol_PlotLinesHovered]      = ImVec4(0.92f, 0.18f, 0.29f, 1.00f);
 	style.Colors[ImGuiCol_PlotHistogram]         = ImVec4(0.86f, 0.93f, 0.89f, 0.63f);
@@ -562,7 +559,7 @@ ImFont* Renderer::addFont( const ci::fs::path &font, float size, const ImWchar*
 		// find glyph ranges
 		mFontsGlyphRanges.push_back( vector<ImWchar>() );
 		auto &ranges = mFontsGlyphRanges.back();
-		Font::Glyph start = glyphs[0] == 0 ? '0' : glyphs[0];
+		Font::Glyph start = glyphs[0] == 0 ? ' ' : glyphs[0];
 		for( size_t i = 1; i < numGlyphs; ++i ) {
 			if( glyphs[i] != glyphs[i-1] + 1 ) {
 				ranges.push_back( start );
@@ -977,6 +974,11 @@ static signals::ConnectionList sAppConnections;
 
 void initialize( const Options &options )
 {
+	if( sInitialized ) {
+		CI_LOG_W("CinderImGui has already been initialized.");
+		return;
+	}
+
 	// create one context for now. will update with multiple context / shared fontatlas soon!
 	ImGuiContext* context = ImGui::CreateContext();