diff --git a/lucid.cabal b/lucid.cabal
--- a/lucid.cabal
+++ b/lucid.cabal
@@ -1,5 +1,5 @@
 name:                lucid
-version:             2.3
+version:             2.4
 synopsis:            Clear to write, read and edit DSL for HTML
 description:         Clear to write, read and edit DSL for HTML. See the 'Lucid' module
                      for description and documentation.
diff --git a/src/Lucid/Html5.hs b/src/Lucid/Html5.hs
--- a/src/Lucid/Html5.hs
+++ b/src/Lucid/Html5.hs
@@ -459,7 +459,7 @@
 
 -- | The @acceptCharset@ attribute.
 acceptCharset_ :: Text -> Attribute
-acceptCharset_ = makeAttribute "acceptCharset"
+acceptCharset_ = makeAttribute "accept-charset"
 
 -- | The @accesskey@ attribute.
 accesskey_ :: Text -> Attribute
@@ -611,7 +611,7 @@
 
 -- | The @httpEquiv@ attribute.
 httpEquiv_ :: Text -> Attribute
-httpEquiv_ = makeAttribute "httpEquiv"
+httpEquiv_ = makeAttribute "http-equiv"
 
 -- | The @icon@ attribute.
 icon_ :: Text -> Attribute