diff --git a/src/main/resources/fess_label.properties b/src/main/resources/fess_label.properties
index ad06cb8d5..a43ac6644 100644
--- a/src/main/resources/fess_label.properties
+++ b/src/main/resources/fess_label.properties
@@ -266,6 +266,7 @@ labels.facet_filetype_qt=QuickTime Video
 labels.facet_filetype_m4v=M4V Video
 labels.facet_filetype_ogg=OGG Audio
 labels.facet_filetype_wav=WAV Audio
+labels.facet_filetype_webp=WebP Audio
 labels.facet_filetype_aif=AIF Audio
 labels.facet_filetype_mid=MIDI Audio
 labels.facet_filetype_mpga=MPGA Audio
diff --git a/src/main/resources/fess_label_en.properties b/src/main/resources/fess_label_en.properties
index 314d52d83..bce0400fe 100644
--- a/src/main/resources/fess_label_en.properties
+++ b/src/main/resources/fess_label_en.properties
@@ -266,6 +266,7 @@ labels.facet_filetype_qt=QuickTime Video
 labels.facet_filetype_m4v=M4V Video
 labels.facet_filetype_ogg=OGG Audio
 labels.facet_filetype_wav=WAV Audio
+labels.facet_filetype_webp=WebP Audio
 labels.facet_filetype_aif=AIF Audio
 labels.facet_filetype_mid=MIDI Audio
 labels.facet_filetype_mpga=MPGA Audio
diff --git a/src/main/resources/fess_label_ja.properties b/src/main/resources/fess_label_ja.properties
index 02975ecab..35f74c69e 100644
--- a/src/main/resources/fess_label_ja.properties
+++ b/src/main/resources/fess_label_ja.properties
@@ -259,6 +259,7 @@ labels.facet_filetype_qt=QuickTime\u30d3\u30c7\u30aa
 labels.facet_filetype_m4v=M4V\u30d3\u30c7\u30aa
 labels.facet_filetype_ogg=OGG\u30aa\u30fc\u30c7\u30a3\u30aa
 labels.facet_filetype_wav=WAV\u30aa\u30fc\u30c7\u30a3\u30aa
+labels.facet_filetype_webp=WebP\u30aa\u30fc\u30c7\u30a3\u30aa
 labels.facet_filetype_aif=AIF\u30aa\u30fc\u30c7\u30a3\u30aa
 labels.facet_filetype_mid=MIDI\u30aa\u30fc\u30c7\u30a3\u30aa
 labels.facet_filetype_mpga=MPGA\u30aa\u30fc\u30c7\u30a3\u30aa