diff --git a/modules/text/machine_translation/transformer/en-de/requirements.txt b/modules/text/machine_translation/transformer/en-de/requirements.txt
index 270d8d38e7f8c0167f3033159c9f13a671bcb4a3..adf3e7fe61baa839a71c8b276b752c3ad2148ca4 100644
--- a/modules/text/machine_translation/transformer/en-de/requirements.txt
+++ b/modules/text/machine_translation/transformer/en-de/requirements.txt
@@ -1,2 +1,2 @@
-nltk==3.4.5
+sacremoses
 subword-nmt
diff --git a/modules/text/machine_translation/transformer/en-de/utils.py b/modules/text/machine_translation/transformer/en-de/utils.py
index cfd8e7f034786753c70e8704ac27901cf377d912..761f656b00d4533d469d29eecb2eef552305a2d8 100644
--- a/modules/text/machine_translation/transformer/en-de/utils.py
+++ b/modules/text/machine_translation/transformer/en-de/utils.py
@@ -16,14 +16,7 @@ import re
 from typing import List
 
 import codecs
-try:
-    import nltk
-    nltk.data.find('misc/perluniprops')
-    nltk.data.find('corpora/nonbreaking_prefixes')
-except LookupError:
-    nltk.download('perluniprops')
-    nltk.download('nonbreaking_prefixes')
-from nltk.tokenize.moses import MosesTokenizer, MosesDetokenizer
+from sacremoses import MosesTokenizer, MosesDetokenizer
 from subword_nmt.apply_bpe import BPE
 
 
diff --git a/modules/text/machine_translation/transformer/zh-en/requirements.txt b/modules/text/machine_translation/transformer/zh-en/requirements.txt
index e0442c89f12f991b8d9c3a7fa5aa1e98915abf34..6029eb21ad870229e0cb41e4462cf741227e52e2 100644
--- a/modules/text/machine_translation/transformer/zh-en/requirements.txt
+++ b/modules/text/machine_translation/transformer/zh-en/requirements.txt
@@ -1,3 +1,3 @@
-nltk==3.4.5
 jieba
+sacremoses
 subword-nmt
diff --git a/modules/text/machine_translation/transformer/zh-en/utils.py b/modules/text/machine_translation/transformer/zh-en/utils.py
index 6bb054068b0d3dbe1f7383f7d2d0ea577ea3679c..8a556ac668748d3e8ad031c994c295374ee27340 100644
--- a/modules/text/machine_translation/transformer/zh-en/utils.py
+++ b/modules/text/machine_translation/transformer/zh-en/utils.py
@@ -21,14 +21,7 @@ import jieba
 
 jieba.setLogLevel(logging.INFO)
 
-try:
-    import nltk
-    nltk.data.find('misc/perluniprops')
-    nltk.data.find('corpora/nonbreaking_prefixes')
-except LookupError:
-    nltk.download('perluniprops')
-    nltk.download('nonbreaking_prefixes')
-from nltk.tokenize.moses import MosesDetokenizer
+from sacremoses import MosesTokenizer, MosesDetokenizer
 from subword_nmt.apply_bpe import BPE