diff --git a/README.md b/README.md
index be5ca2d..e99243b 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@
 
 C is a low-level programming language and we often end up reinventing the wheel as the C standard library (`libc`) is quite small and in my humble opinion, not well designed.
 
-**libcproject** solve this by providing common functions or data structures (`dictionary`, `linked_list`, `queue`, `stack`, etc.) we might need in our C projects.
+**libcproject** solve this by providing common functions or data structures (`hash_map`, `array_list`, `linked_list`, `queue`, `stack`, etc.) we might need in our C projects.
 
 [Online documentation](https://libcproject.vercel.app/).
 
diff --git a/lib/dictionary.c b/lib/dictionary.c
deleted file mode 100644
index 47fab12..0000000
--- a/lib/dictionary.c
+++ /dev/null
@@ -1,64 +0,0 @@
-#include "dictionary.h"
-
-struct dictionary *dictionary_initialization() {
-  struct dictionary *dictionary = malloc(sizeof(struct dictionary));
-  dictionary->items = malloc(sizeof(struct dictionary_item *) * DICTIONARY_INITIAL_CAPACITY);
-  dictionary->length = 0;
-  dictionary->capacity = DICTIONARY_INITIAL_CAPACITY;
-  for (size_t index = 0; index < dictionary->capacity; index++) {
-    dictionary->items[index] = NULL;
-  }
-  return dictionary;
-}
-
-void dictionary_add(struct dictionary *dictionary, char *key, void *data) {
-  if (dictionary->length == dictionary->capacity) {
-    size_t previous_capacity = dictionary->capacity;
-    dictionary->capacity += DICTIONARY_INITIAL_CAPACITY;
-    dictionary->items = realloc(dictionary->items, sizeof(struct dictionary_item *) * dictionary->capacity);
-    for (size_t index = previous_capacity; index < dictionary->capacity; index++) {
-      dictionary->items[index] = NULL;
-    }
-  }
-  struct dictionary_item *item = NULL;
-  for (size_t index = 0; index < dictionary->length && item == NULL; index++) {
-    if (string_equals(key, dictionary->items[index]->key)) {
-      item = dictionary->items[index];
-    }
-  }
-  if (item == NULL) {
-    item = malloc(sizeof(struct dictionary_item));
-    item->key = key;
-    item->data = data;
-    dictionary->items[dictionary->length] = item;
-    dictionary->length++;
-  } else {
-    item->data = data;
-  }
-}
-
-void dictionary_remove(struct dictionary *dictionary, char *key) {
-  bool found = false;
-  for (size_t index = 0; index < dictionary->length && !found; index++) {
-    if (string_equals(key, dictionary->items[index]->key)) {
-      free(dictionary->items[index]);
-      dictionary->items[index] = dictionary->items[dictionary->length - 1];
-      dictionary->length--;
-      found = true;
-    }
-  }
-}
-
-struct dictionary_item *dictionary_get(struct dictionary *dictionary, char *key) {
-  for (size_t index = 0; index < dictionary->length; index++) {
-    struct dictionary_item *item = dictionary->items[index];
-    if (string_equals(key, item->key)) {
-      return item;
-    }
-  }
-  return NULL;
-}
-
-bool dictionary_contains_key(struct dictionary *dictionary, char *key) {
-  return dictionary_get(dictionary, key) != NULL;
-}
diff --git a/lib/dictionary.h b/lib/dictionary.h
deleted file mode 100644
index d08073b..0000000
--- a/lib/dictionary.h
+++ /dev/null
@@ -1,35 +0,0 @@
-#ifndef __LIBCPROJECT_DICTIONARY__
-#define __LIBCPROJECT_DICTIONARY__
-
-#include <stdbool.h>
-#include <stdlib.h>
-
-#include "string.h"
-#include "types.h"
-
-#define DICTIONARY_INITIAL_CAPACITY 10
-
-// Dictionary implementation with O(n) lookup complexity.
-struct dictionary {
-  struct dictionary_item **items;
-
-  size_t length;
-  size_t capacity;
-};
-
-struct dictionary_item {
-  void *data;
-  char *key;
-};
-
-struct dictionary *dictionary_initialization();
-
-void dictionary_add(struct dictionary *dictionary, char *key, void *data);
-
-void dictionary_remove(struct dictionary *dictionary, char *key);
-
-struct dictionary_item *dictionary_get(struct dictionary *dictionary, char *key);
-
-bool dictionary_contains_key(struct dictionary *dictionary, char *key);
-
-#endif
diff --git a/lib/terminal.c b/lib/terminal.c
index bbdb932..6209ada 100644
--- a/lib/terminal.c
+++ b/lib/terminal.c
@@ -94,22 +94,6 @@ void terminal_print_linked_list(struct linked_list* linked_list, void (*print_el
   printf("NULL\n");
 }
 
-void terminal_print_dictionary(struct dictionary* dictionary, void (*print_element)(void*)) {
-  if (dictionary == NULL) {
-    exit(EXIT_FAILURE);
-  }
-  printf("{\n");
-  for (size_t index = 0; index < dictionary->length; index++) {
-    struct dictionary_item* item = dictionary->items[index];
-    printf("\t\"");
-    terminal_print_string(item->key);
-    printf("\" -> ");
-    print_element(&item->data);
-    printf("\n");
-  }
-  printf("}\n");
-}
-
 void terminal_print_hash_map(struct hash_map* hash_map, void (*print_element)(void*)) {
   if (hash_map == NULL) {
     exit(EXIT_FAILURE);
diff --git a/lib/terminal.h b/lib/terminal.h
index 4d07a0b..1bf62b8 100644
--- a/lib/terminal.h
+++ b/lib/terminal.h
@@ -7,7 +7,6 @@
 #include <stdlib.h>
 
 #include "character.h"
-#include "dictionary.h"
 #include "hash_map.h"
 #include "linked_list.h"
 #include "queue.h"
@@ -98,15 +97,6 @@ void terminal_print_queue(struct queue* queue, void (*print_element)(void*));
  */
 void terminal_print_linked_list(struct linked_list* linked_list, void (*print_element)(void*));
 
-/**
- * @brief Print a dictionary.
- *
- * @param dictionary
- * @param print_element
- * @since v1.0.0
- */
-void terminal_print_dictionary(struct dictionary* dictionary, void (*print_element)(void*));
-
 /**
  * @brief Print a hash map.
  *
diff --git a/libcproject.h b/libcproject.h
index eea5aec..212d2d3 100644
--- a/libcproject.h
+++ b/libcproject.h
@@ -4,7 +4,6 @@
 #include "lib/array_list.h"
 #include "lib/character.h"
 #include "lib/convert.h"
-#include "lib/dictionary.h"
 #include "lib/filesystem.h"
 #include "lib/hash_map.h"
 #include "lib/linked_list.h"
diff --git a/test/dictionary_test.c b/test/dictionary_test.c
deleted file mode 100644
index 9a216fb..0000000
--- a/test/dictionary_test.c
+++ /dev/null
@@ -1,27 +0,0 @@
-#include "dictionary_test.h"
-
-void dictionary_test() {
-  struct dictionary *dictionary = dictionary_initialization();
-  assert(dictionary->length == 0);
-  dictionary_add(dictionary, "key", (void *)'a');
-  dictionary_add(dictionary, "key1", (void *)'b');
-  dictionary_add(dictionary, "key2", (void *)'c');
-  dictionary_add(dictionary, "key3", (void *)'d');
-  dictionary_add(dictionary, "key4", (void *)'e');
-  dictionary_add(dictionary, "key5", (void *)'f');
-  assert(dictionary->length == 6);
-  assert(dictionary_get(dictionary, "key")->data == (void *)'a');
-  assert(dictionary_get(dictionary, "key1")->data == (void *)'b');
-  assert(dictionary_get(dictionary, "key2")->data == (void *)'c');
-  assert(dictionary_get(dictionary, "key3")->data == (void *)'d');
-  assert(dictionary_get(dictionary, "key4")->data == (void *)'e');
-  assert(dictionary_get(dictionary, "key5")->data == (void *)'f');
-  dictionary_add(dictionary, "key5", (void *)'a');
-  assert(dictionary_get(dictionary, "key5")->data == (void *)'a');
-  assert(dictionary_contains_key(dictionary, "key5"));
-  assert(!dictionary_contains_key(dictionary, "invalid key"));
-  assert(dictionary_contains_key(dictionary, "key5"));
-  dictionary_remove(dictionary, "key5");
-  assert(dictionary->length == 5);
-  assert(!dictionary_contains_key(dictionary, "key5"));
-}
diff --git a/test/dictionary_test.h b/test/dictionary_test.h
deleted file mode 100644
index 5516aa7..0000000
--- a/test/dictionary_test.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef __DICTIONARY_TEST__
-#define __DICTIONARY_TEST__
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "libcproject.h"
-
-void dictionary_test();
-
-#endif
diff --git a/test/main.c b/test/main.c
index 574c8e4..638a224 100644
--- a/test/main.c
+++ b/test/main.c
@@ -4,7 +4,6 @@
 #include "array_list_test.h"
 #include "character_test.h"
 #include "convert_test.h"
-#include "dictionary_test.h"
 #include "hash_map_test.h"
 #include "linked_list_test.h"
 #include "mathematics_test.h"
@@ -16,7 +15,6 @@ int main() {
   array_list_test();
   character_test();
   convert_test();
-  dictionary_test();
   hash_map_test();
   linked_list_test();
   mathematics_test();