diff --git a/.gitignore b/.gitignore
index 0bd57ed..cab31f3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@ Testing/
 compile_commands.json
 ../compile_commands.json
 build/compile_commands.json
+cmake
 
 # Make / Ninja
 Makefile
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5f85221..8be934b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,14 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 option(GRAPH_BUILD_TESTS "Build arraylist tests" OFF)
 option(GRAPH_ENABLE_SANITIZERS "Enable sanitizers for tests" ON)
 
+include(cmake/CPM.cmake)
+
+CPMAddPackage(
+    NAME arraylist
+    GIT_REPOSITORY https://laentropia-homelab.tail7368da.ts.net/laentropia/ArrayList.git
+    GIT_TAG main
+)
+
 # ------------------------
 # Library
 # ------------------------
@@ -39,6 +47,10 @@ target_link_libraries(graph_example
     graph
 )
 
+target_link_libraries(graph
+    PUBLIC arraylist
+)
+
 # ------------------------
 # Testing
 # ------------------------
diff --git a/include/graph.h b/include/graph.h
index abd2930..ac244c9 100644
--- a/include/graph.h
+++ b/include/graph.h
@@ -1,6 +1,20 @@
 #ifndef GRAPH_H
 #define GRAPH_H
 
+#include <stdlib.h>
+
+typedef struct Graph Graph;
+typedef struct Vertex Vertex;
+typedef struct Edge Edge;
+
+typedef enum {
+    GRAPH_OK,
+} GraphErr ;
+
+typedef enum {
+    GRAPH_DIRECTED,
+    GRAPH_UNDIRECTED,
+} GraphType;
 
 
 #endif
diff --git a/src/graph.c b/src/graph.c
index e8b6b5e..cf53a7e 100644
--- a/src/graph.c
+++ b/src/graph.c
@@ -1 +1,22 @@
 #include "graph.h"
+#include "arraylist.h"
+#include <inttypes.h>
+#include <stdint.h>
+
+struct Vertex {
+    void *data;
+    ArrayList *edges;
+};
+
+struct Edge {
+    size_t *to;
+    intmax_t weight;
+};
+
+struct Graph {
+    ArrayList *vertices;
+    GraphType type;
+    
+    int (*cmp)(const void*, const void*);
+    void (*free_data)(void*);
+};
diff --git a/src/main.c b/src/main.c
index 1de0591..24acc10 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,5 +1,4 @@
 #include <stdlib.h>
-#include <stdio.h>
 
 int main(void) {
     return EXIT_SUCCESS;