diff --git a/libsignal/src/main/java/org/session/libsignal/utilities/Validation.kt b/libsignal/src/main/java/org/session/libsignal/utilities/Validation.kt
index d0453fc140..fdf9bd386f 100644
--- a/libsignal/src/main/java/org/session/libsignal/utilities/Validation.kt
+++ b/libsignal/src/main/java/org/session/libsignal/utilities/Validation.kt
@@ -1,11 +1,11 @@
 package org.session.libsignal.utilities
 
 object PublicKeyValidation {
-    private val HEX_CHARACTERS = "0123456789ABCDEF".toSet()
+    private val HEX_CHARACTERS = "0123456789ABCDEFabcdef".toSet()
     private val INVALID_PREFIXES = setOf(IdPrefix.GROUP, IdPrefix.BLINDED, IdPrefix.BLINDEDV2)
 
     fun isValid(candidate: String, isPrefixRequired: Boolean = true): Boolean = hasValidLength(candidate) && isValidHexEncoding(candidate) && (!isPrefixRequired || IdPrefix.fromValue(candidate) != null)
     fun hasValidPrefix(candidate: String) = IdPrefix.fromValue(candidate) !in INVALID_PREFIXES
     private fun hasValidLength(candidate: String) = candidate.length == 66
-    private fun isValidHexEncoding(candidate: String) = HEX_CHARACTERS.containsAll(candidate.uppercase().toSet())
+    private fun isValidHexEncoding(candidate: String) = HEX_CHARACTERS.containsAll(candidate.toSet())
 }