diff --git a/setup.py b/setup.py
index 52fef444f7..2753236f9d 100644
--- a/setup.py
+++ b/setup.py
@@ -86,7 +86,7 @@ setup(
     packages=find_packages("src"),
     install_requires=[
         "numpy",
-        "tokenizers",
+        "tokenizers == 0.0.10",
         # accessing files from S3 directly
         "boto3",
         # filesystem locks e.g. to prevent parallel downloads
diff --git a/src/transformers/tokenization_bert.py b/src/transformers/tokenization_bert.py
index cb78f03df7..5362806bdc 100644
--- a/src/transformers/tokenization_bert.py
+++ b/src/transformers/tokenization_bert.py
@@ -583,12 +583,14 @@ class BertTokenizerFast(FastPreTrainedTokenizer):
                 )
             )
         if max_length is not None:
-            self._tokenizer.with_truncation(max_length, stride, truncation_strategy)
+            self._tokenizer.with_truncation(max_length,
+                                            stride=stride,
+                                            strategy=truncation_strategy)
         self._tokenizer.with_padding(
-            max_length if pad_to_max_length else None,
-            self.padding_side,
-            self.pad_token_id,
-            self.pad_token_type_id,
-            self.pad_token,
+            max_length=max_length if pad_to_max_length else None,
+            direction=self.padding_side,
+            pad_id=self.pad_token_id,
+            pad_type_id=self.pad_token_type_id,
+            pad_token=self.pad_token,
         )
         self._decoder = tk.decoders.WordPiece.new()
diff --git a/src/transformers/tokenization_gpt2.py b/src/transformers/tokenization_gpt2.py
index bba5eeb762..4cc1d4708e 100644
--- a/src/transformers/tokenization_gpt2.py
+++ b/src/transformers/tokenization_gpt2.py
@@ -274,15 +274,17 @@ class GPT2TokenizerFast(FastPreTrainedTokenizer):
 
         self._tokenizer = tk.Tokenizer(tk.models.BPE.from_files(vocab_file, merges_file))
         self._update_special_tokens()
-        self._tokenizer.with_pre_tokenizer(tk.pre_tokenizers.ByteLevel.new(add_prefix_space))
+        self._tokenizer.with_pre_tokenizer(tk.pre_tokenizers.ByteLevel.new(add_prefix_space=add_prefix_space))
         self._tokenizer.with_decoder(tk.decoders.ByteLevel.new())
         if max_length:
-            self._tokenizer.with_truncation(max_length, stride, truncation_strategy)
+            self._tokenizer.with_truncation(max_length,
+                                            stride=stride,
+                                            strategy=truncation_strategy)
         self._tokenizer.with_padding(
-            max_length if pad_to_max_length else None,
-            self.padding_side,
-            self.pad_token_id if self.pad_token_id is not None else 0,
-            self.pad_token_type_id,
-            self.pad_token if self.pad_token is not None else "",
+            max_length=max_length if pad_to_max_length else None,
+            direction=self.padding_side,
+            pad_id=self.pad_token_id if self.pad_token_id is not None else 0,
+            pad_type_id=self.pad_token_type_id,
+            pad_token=self.pad_token if self.pad_token is not None else "",
         )
         self._decoder = tk.decoders.ByteLevel.new()
diff --git a/src/transformers/tokenization_utils.py b/src/transformers/tokenization_utils.py
index 57e2b909f7..c52ba6ff79 100644
--- a/src/transformers/tokenization_utils.py
+++ b/src/transformers/tokenization_utils.py
@@ -1430,10 +1430,10 @@ class FastPreTrainedTokenizer(PreTrainedTokenizer):
 
     @property
     def vocab_size(self):
-        return self.tokenizer.get_vocab_size(False)
+        return self.tokenizer.get_vocab_size(with_added_tokens=False)
 
     def __len__(self):
-        return self.tokenizer.get_vocab_size(True)
+        return self.tokenizer.get_vocab_size(with_added_tokens=True)
 
     def _update_special_tokens(self):
         self.tokenizer.add_special_tokens(self.all_special_tokens)