diff --git a/src/common/upgrade.rs b/src/common/upgrade.rs
index 8002b68b..06836619 100644
--- a/src/common/upgrade.rs
+++ b/src/common/upgrade.rs
@@ -52,4 +52,40 @@ impl Upgrade {
     pub fn websocket() -> Upgrade {
         Upgrade(HeaderValue::from_static("websocket"))
     }
+
+    /// Constructs an `Upgrade: h2c` header, for HTTP/2 over TCP. There's no
+    /// constructor for HTTP/2 over TLS, as using ALPN or prior knowledge is
+    /// better-suited to that usecase.
+    pub fn h2c() -> Upgrade {
+        Upgrade(HeaderValue::from_static("h2c"))
+    }
+
+    /// Constructs an `Upgrade` header with the given `HeaderValue`
+    pub fn new(value: HeaderValue) -> Upgrade {
+        Upgrade(value)
+    }
+
+    /// Returns the header value, e.g. "websocket" or "h2c", or a
+    /// comma-separated list, see RFC 7230:
+    /// <https://datatracker.ietf.org/doc/html/rfc7230#section-6.7>
+    ///
+    /// If the header value cannot be represented as a utf-8 string,
+    /// `None` is returned.
+    pub fn to_str(&self) -> Option<&str> {
+        self.0.to_str().ok()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::super::test_decode;
+    use super::*;
+
+    #[test]
+    fn websocket() {
+        let s = "websocket";
+        let loc = test_decode::<Upgrade>(&[s]).unwrap();
+
+        assert_eq!(loc.to_str(), Some(s));
+    }
 }