diff --git a/src/all/kavita/src/eu/kanade/tachiyomi/extension/all/kavita/Kavita.kt b/src/all/kavita/src/eu/kanade/tachiyomi/extension/all/kavita/Kavita.kt
index 9eb70be0..190e984f 100644
--- a/src/all/kavita/src/eu/kanade/tachiyomi/extension/all/kavita/Kavita.kt
+++ b/src/all/kavita/src/eu/kanade/tachiyomi/extension/all/kavita/Kavita.kt
@@ -312,7 +312,7 @@ class Kavita(private val suffix: String = "") : ConfigurableSource, UnmeteredSou
             filter.addStatement(
                 FilterComparison.NotContains,
                 FilterField.Formats,
-                "3",
+                KavitaConstants.EPUB,
             )
         }
 
@@ -335,7 +335,7 @@ class Kavita(private val suffix: String = "") : ConfigurableSource, UnmeteredSou
             filter.addStatement(
                 FilterComparison.NotContains,
                 FilterField.Formats,
-                "3",
+                KavitaConstants.EPUB,
             )
         }
 
@@ -756,7 +756,7 @@ class Kavita(private val suffix: String = "") : ConfigurableSource, UnmeteredSou
             filterV2.addStatement(
                 FilterComparison.NotContains,
                 FilterField.Formats,
-                "3",
+                KavitaConstants.EPUB,
             )
         }
         val payload = json.encodeToJsonElement(filterV2).toString()
diff --git a/src/all/kavita/src/eu/kanade/tachiyomi/extension/all/kavita/KavitaConstants.kt b/src/all/kavita/src/eu/kanade/tachiyomi/extension/all/kavita/KavitaConstants.kt
index 21f7ba4c..f36e78d3 100644
--- a/src/all/kavita/src/eu/kanade/tachiyomi/extension/all/kavita/KavitaConstants.kt
+++ b/src/all/kavita/src/eu/kanade/tachiyomi/extension/all/kavita/KavitaConstants.kt
@@ -4,6 +4,7 @@ object KavitaConstants {
 
     const val UNNUMBERED_VOLUME = -100000
     const val UNNUMBERED_VOLUME_STR = "-100000"
+    const val EPUB = "3"
 
     val PERSON_ROLES = listOf(
         "Writer", "Penciller", "Inker", "Colorist",