diff --git a/samples/snippets/hybrid_glossaries/requirements.txt b/samples/snippets/hybrid_glossaries/requirements.txt
index 8c2aee9c..87ed4196 100644
--- a/samples/snippets/hybrid_glossaries/requirements.txt
+++ b/samples/snippets/hybrid_glossaries/requirements.txt
@@ -1,3 +1,3 @@
 google-cloud-translate==3.2.1
 google-cloud-vision==2.3.2
-google-cloud-texttospeech==2.4.0
+google-cloud-texttospeech==2.5.0