diff --git a/httpx/_utils.py b/httpx/_utils.py
index dc809e45..9bfa779f 100644
--- a/httpx/_utils.py
+++ b/httpx/_utils.py
@@ -69,6 +69,13 @@ SUPPORTED_CODECS = {
     "shift_jis",  # shift-jis
     "utf-8",  # utf-8
     "utf-16-le",  # utf-16le
+    # We also support the following UTF flavors...
+    "utf-8-sig",
+    "utf-16",
+    "utf-16-be",
+    "utf-32",
+    "utf-32-be",
+    "utf-32-le",
 }