diff --git a/wordlist/create_list.py b/wordlist/create_list.py
index 0949a2d..9e03d1b 100644
--- a/wordlist/create_list.py
+++ b/wordlist/create_list.py
@@ -5,9 +5,16 @@ MAX_LENGTH = 10
 
 NUMBER_DAYS = 5 * 365
 
+# Set to True if you want to use the big but difficult OpenTaal list
+USE_OPENTAAL = False
+
+with open('wikiwoordenboek_basiswoorden.lst', 'r', encoding='utf-8') as wordfile:
+    wikiwoorden_words = wordfile.readlines()
+    print(f'wikiwoorden basic list contains {len(wikiwoorden_words)} words')
+
 with open('basiswoorden-gekeurd.txt', 'r', encoding='utf-8') as wordfile:
     basis_words = wordfile.readlines()
-    print(f'original list contains {len(basis_words)} words')
+    print(f'opentaal basic list contains {len(basis_words)} words')
 
 with open('flexies-ongekeurd.txt', 'r', encoding='utf-8') as wordfile:
     # Vervoegingen and such, see https://nl.wikipedia.org/wiki/Flexie_(taalkunde)
@@ -26,30 +33,43 @@ print()
 all_words_count = 0
 dictionary_list = []
 result_list = []
-for word in basis_words + flexies_words:
+for word in wikiwoorden_words + basis_words + flexies_words:
     all_words_count += 1
     word = word.strip()
     if word.isalpha() and word.lower() == word:
         # Word is valid for our dictionary
         dictionary_list.append(f'{word}\n')
 
-for word in basis_words:
+# Deduplicate dictionary
+dictionary_list = sorted(list(set(dictionary_list)), key=str.casefold)
+
+if USE_OPENTAAL:
+    # Use basis_words if you want to use the big but difficult OpenTaal list
+    source_words = basis_words
+else:
+    source_words = wikiwoorden_words
+
+for word in source_words:
     word = word.strip()
     if word.isalpha() and word.lower() == word and len(word) >= MIN_LENGTH and len(word) <= MAX_LENGTH:
         # Word is 'fit' for our game
         result_list.append(f'{word}\n')
 
-nl_set = set(result_list)
-en_set = set(english_words)
+if USE_OPENTAAL:
+    nl_set = set(result_list)
+    en_set = set(english_words)
 
-# Only keep the words that are not found in the English set
-filtered_set = nl_set.difference(en_set)
-filtered_list = sorted(list(filtered_set), key=str.casefold)
+    # Only keep the words that are not found in the English set
+    filtered_set = nl_set.difference(en_set)
+    filtered_list = sorted(list(filtered_set), key=str.casefold)
+else:
+    filtered_list = sorted(list(wikiwoorden_words), key=str.casefold)
 
 print(f'words total: {all_words_count}')
 print(f'words in dictionary: {len(dictionary_list)}')
 print(f'words initially filtered: {len(result_list)} with length >= {MIN_LENGTH} and <= {MAX_LENGTH}')
-print(f'words after filtering english: {len(filtered_list)}')
+if USE_OPENTAAL:
+    print(f'words after filtering english: {len(filtered_list)}')
 
 with open('filtered.txt', 'w', encoding='utf-8') as f:
     f.writelines(filtered_list)
@@ -63,7 +83,7 @@ selection_list = []
 while len(selection_list) < NUMBER_DAYS:
     # Use index - 1 because lists start at index 0
     word_index = random.randrange(0, len(filtered_list) - 1)
-    selection_list.append(result_list[word_index])
+    selection_list.append(filtered_list[word_index])
 
 # Save the result
 with open('word_of_the_day.txt', 'w', encoding='utf-8') as f: