diff --git a/CMakeLists.txt b/CMakeLists.txt
index b3e5309..bf5ae88 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -130,7 +130,7 @@ elseif(APPLE)
 	list(APPEND MAIN_SOURCE src/mac-desktop.mm)
 else()
 	find_package(PkgConfig REQUIRED)
-	pkg_check_modules(LINUXPKGS REQUIRED gtk+-2.0 libxfconf-0)
+	pkg_check_modules(LINUXPKGS REQUIRED gtk+-4.0 libxfconf-0)
 	include_directories(${LINUXPKGS_INCLUDE_DIRS})
 	add_compile_options(${LINUXPKGS_CFLAGS_OTHER})
 	list(APPEND PLATFORM_LIBRARIES ${LINUXPKGS_LDFLAGS})
diff --git a/src/font.cpp b/src/font.cpp
index c40b3cf..b1cc869 100644
--- a/src/font.cpp
+++ b/src/font.cpp
@@ -88,7 +88,7 @@ SharedFontState::~SharedFontState()
 	delete p;
 }
 
-void SharedFontState::initFontSetCB(SDL_RWops &ops,
+void SharedFontState::initFontSetCB(SDL_IOStream &ops,
                                     const std::string &filename)
 {
 	TTF_Font *font = TTF_OpenFontRW(&ops, 0, 0);
@@ -96,8 +96,8 @@ void SharedFontState::initFontSetCB(SDL_RWops &ops,
 	if (!font)
 		return;
 
-	std::string family = TTF_FontFaceFamilyName(font);
-	std::string style = TTF_FontFaceStyleName(font);
+	std::string family = TTF_GetFontFamilyName(font);
+	std::string style = TTF_GetFontStyleName(font);
 
 	TTF_CloseFont(font);
 
@@ -133,7 +133,7 @@ _TTF_Font *SharedFontState::getFont(std::string family,
 		return font;
 
 	/* Not in pool; open new handle */
-	SDL_RWops *ops;
+	SDL_IOStream *ops;
 
 	if (family.empty())
 	{
@@ -146,7 +146,7 @@ _TTF_Font *SharedFontState::getFont(std::string family,
 		const char *path = !req.regular.empty()
 		                 ? req.regular.c_str() : req.other.c_str();
 
-		ops = SDL_AllocRW();
+		ops = SDL_OpenIO();
 		shState->fileSystem().openReadRaw(*ops, path, true);
 	}
 
diff --git a/src/font.h b/src/font.h
index 2724762..c436809 100644
--- a/src/font.h
+++ b/src/font.h
@@ -28,7 +28,7 @@
 #include <vector>
 #include <string>
 
-struct SDL_RWops;
+struct SDL_IOStream;
 struct _TTF_Font;
 struct Config;
 
@@ -44,7 +44,7 @@ public:
 	 * (when "Fonts/" is scanned for available assets).
 	 * 'ops' is an opened handle to a possible font file,
 	 * 'filename' is the corresponding path */
-	void initFontSetCB(SDL_RWops &ops,
+	void initFontSetCB(SDL_IOStream &ops,
 	                   const std::string &filename);
 
 	_TTF_Font *getFont(std::string family,
diff --git a/src/gl-fun.cpp b/src/gl-fun.cpp
index cb520bd..41f2999 100644
--- a/src/gl-fun.cpp
+++ b/src/gl-fun.cpp
@@ -24,7 +24,7 @@
 #include "boost-hash.h"
 #include "exception.h"
 
-#include <SDL_video.h>
+#include <SDL3/SDL_video.h>
 #include <string>
 
 GLFunctions gl;
diff --git a/src/gl-fun.h b/src/gl-fun.h
index b989ba9..72c726d 100644
--- a/src/gl-fun.h
+++ b/src/gl-fun.h
@@ -26,7 +26,7 @@
 #include <SDL_opengles2.h>
 #define APIENTRYP GL_APIENTRYP
 #else
-#include <SDL_opengl.h>
+#include <SDL3/SDL_opengl.h>
 #endif
 
 /* Etc */
diff --git a/src/gl-meta.cpp b/src/gl-meta.cpp
index 321c6eb..97579bf 100644
--- a/src/gl-meta.cpp
+++ b/src/gl-meta.cpp
@@ -51,7 +51,7 @@ void subRectImageUpload(GLint srcW, GLint srcX, GLint srcY,
 
 		TEX::uploadSubImage(dstX, dstY, dstW, dstH, tmp->pixels, format);
 
-		SDL_FreeSurface(tmp);
+		SDL_DestroySurface(tmp);
 	}
 }
 
diff --git a/src/gl-meta.h b/src/gl-meta.h
index a30e478..f8d5d96 100644
--- a/src/gl-meta.h
+++ b/src/gl-meta.h
@@ -26,7 +26,7 @@
 #include "gl-util.h"
 #include "vertex.h"
 
-#include <SDL_surface.h>
+#include <SDL3/SDL_surface.h>
 
 namespace GLMeta
 {
diff --git a/src/glstate.cpp b/src/glstate.cpp
index ff88de7..96b00b1 100644
--- a/src/glstate.cpp
+++ b/src/glstate.cpp
@@ -25,7 +25,7 @@
 #include "gl-fun.h"
 #include "config.h"
 
-#include <SDL_rect.h>
+#include <SDL3/SDL_rect.h>
 
 static void applyBool(GLenum state, bool mode)
 {
diff --git a/src/graphics.cpp b/src/graphics.cpp
index 8cd2132..44332fb 100644
--- a/src/graphics.cpp
+++ b/src/graphics.cpp
@@ -39,9 +39,9 @@
 #include "debugwriter.h"
 #include "oneshot.h"
 
-#include <SDL_video.h>
-#include <SDL_timer.h>
-#include <SDL_image.h>
+#include <SDL3/SDL_video.h>
+#include <SDL3/SDL_timer.h>
+#include <SDL3_image/SDL_image.h>
 
 #include <time.h>
 #ifndef _MSC_VER