diff --git a/thirdparty/README.md b/thirdparty/README.md
index 2f765a4000..06084641cc 100644
--- a/thirdparty/README.md
+++ b/thirdparty/README.md
@@ -115,7 +115,7 @@ Files extracted from upstream source:
 ## glad
 
 - Upstream: https://github.com/Dav1dde/glad
-- Version: 0.1.16a0
+- Version: 0.1.20a0
 - License: MIT
 
 The files we package are automatically generated.
diff --git a/thirdparty/glad/KHR/khrplatform.h b/thirdparty/glad/KHR/khrplatform.h
index 1ad3554a76..975bbffed6 100644
--- a/thirdparty/glad/KHR/khrplatform.h
+++ b/thirdparty/glad/KHR/khrplatform.h
@@ -2,7 +2,7 @@
 #define __khrplatform_h_
 
 /*
-** Copyright (c) 2008-2009 The Khronos Group Inc.
+** Copyright (c) 2008-2018 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
@@ -26,18 +26,16 @@
 
 /* Khronos platform-specific types and definitions.
  *
- * $Revision: 32517 $ on $Date: 2016-03-11 02:41:19 -0800 (Fri, 11 Mar 2016) $
+ * The master copy of khrplatform.h is maintained in the Khronos EGL
+ * Registry repository at https://github.com/KhronosGroup/EGL-Registry
+ * The last semantic modification to khrplatform.h was at commit ID:
+ *      67a3e0864c2d75ea5287b9f3d2eb74a745936692
  *
  * Adopters may modify this file to suit their platform. Adopters are
  * encouraged to submit platform specific modifications to the Khronos
  * group so that they can be included in future versions of this file.
- * Please submit changes by sending them to the public Khronos Bugzilla
- * (http://khronos.org/bugzilla) by filing a bug against product
- * "Khronos (general)" component "Registry".
- *
- * A predefined template which fills in some of the bug fields can be
- * reached using http://tinyurl.com/khrplatform-h-bugreport, but you
- * must create a Bugzilla login first.
+ * Please submit changes by filing pull requests or issues on
+ * the EGL Registry repository linked above.
  *
  *
  * See the Implementer's Guidelines for information about where this file
diff --git a/thirdparty/glad/glad.c b/thirdparty/glad/glad.c
index c2aaea2144..8f8b2189ec 100644
--- a/thirdparty/glad/glad.c
+++ b/thirdparty/glad/glad.c
@@ -1,6 +1,6 @@
 /*
 
-    OpenGL loader generated by glad 0.1.18a0 on Mon Mar  5 18:43:52 2018.
+    OpenGL loader generated by glad 0.1.20a0 on Fri May  4 21:44:11 2018.
 
     Language/Generator: C/C++
     Specification: gl
@@ -27,21 +27,40 @@
 
 static void* get_proc(const char *namez);
 
-#ifdef _WIN32
+#if defined(_WIN32) || defined(__CYGWIN__)
 #include <windows.h>
 static HMODULE libGL;
 
 typedef void* (APIENTRYP PFNWGLGETPROCADDRESSPROC_PRIVATE)(const char*);
 static PFNWGLGETPROCADDRESSPROC_PRIVATE gladGetProcAddressPtr;
 
+#ifdef _MSC_VER
+#ifdef __has_include
+  #if __has_include(<winapifamily.h>)
+    #define HAVE_WINAPIFAMILY 1
+  #endif
+#elif _MSC_VER >= 1700 && !_USING_V110_SDK71_
+  #define HAVE_WINAPIFAMILY 1
+#endif
+#endif
+
+#ifdef HAVE_WINAPIFAMILY
+  #include <winapifamily.h>
+  #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
+    #define IS_UWP 1
+  #endif
+#endif
+
 static
 int open_gl(void) {
+#ifndef IS_UWP
     libGL = LoadLibraryW(L"opengl32.dll");
     if(libGL != NULL) {
         gladGetProcAddressPtr = (PFNWGLGETPROCADDRESSPROC_PRIVATE)GetProcAddress(
                 libGL, "wglGetProcAddress");
         return gladGetProcAddressPtr != NULL;
     }
+#endif
 
     return 0;
 }
@@ -50,7 +69,7 @@ static
 void close_gl(void) {
     if(libGL != NULL) {
         FreeLibrary((HMODULE) libGL);
-    libGL = NULL;
+        libGL = NULL;
     }
 }
 #else
@@ -113,7 +132,7 @@ void* get_proc(const char *namez) {
     }
 #endif
     if(result == NULL) {
-#ifdef _WIN32
+#if defined(_WIN32) || defined(__CYGWIN__)
         result = (void*)GetProcAddress((HMODULE) libGL, namez);
 #else
         result = dlsym(libGL, namez);
diff --git a/thirdparty/glad/glad/glad.h b/thirdparty/glad/glad/glad.h
index 9de720fbc2..4eebad4f2f 100644
--- a/thirdparty/glad/glad/glad.h
+++ b/thirdparty/glad/glad/glad.h
@@ -1,6 +1,6 @@
 /*
 
-    OpenGL loader generated by glad 0.1.18a0 on Mon Mar  5 18:43:52 2018.
+    OpenGL loader generated by glad 0.1.20a0 on Fri May  4 21:44:11 2018.
 
     Language/Generator: C/C++
     Specification: gl
@@ -1581,7 +1581,7 @@ GLAPI PFNGLGETTEXLEVELPARAMETERIVPROC glad_glGetTexLevelParameteriv;
 typedef GLboolean (APIENTRYP PFNGLISENABLEDPROC)(GLenum cap);
 GLAPI PFNGLISENABLEDPROC glad_glIsEnabled;
 #define glIsEnabled glad_glIsEnabled
-typedef void (APIENTRYP PFNGLDEPTHRANGEPROC)(GLdouble near, GLdouble far);
+typedef void (APIENTRYP PFNGLDEPTHRANGEPROC)(GLdouble n, GLdouble f);
 GLAPI PFNGLDEPTHRANGEPROC glad_glDepthRange;
 #define glDepthRange glad_glDepthRange
 typedef void (APIENTRYP PFNGLVIEWPORTPROC)(GLint x, GLint y, GLsizei width, GLsizei height);