diff --git a/samples/snippets/hybrid_glossaries/requirements.txt b/samples/snippets/hybrid_glossaries/requirements.txt
index 9288195e..984bbb64 100644
--- a/samples/snippets/hybrid_glossaries/requirements.txt
+++ b/samples/snippets/hybrid_glossaries/requirements.txt
@@ -1,3 +1,3 @@
 google-cloud-translate==3.4.0
 google-cloud-vision==2.4.3
-google-cloud-texttospeech==2.5.2
+google-cloud-texttospeech==2.5.3