diff --git a/.circleci/config.yml b/.circleci/config.yml
index 353c27cd..82c12dab 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -91,7 +91,7 @@ macos_job: &MACOS_JOB
 
 openssl_111: &OPENSSL_111
   LIBRARY: openssl
-  VERSION: 1.1.1-pre2
+  VERSION: 1.1.1-pre3
 openssl_110: &OPENSSL_110
   LIBRARY: openssl
   VERSION: 1.1.0g
diff --git a/openssl-sys/src/ossl111.rs b/openssl-sys/src/ossl111.rs
index 23599d32..6d6f8d4f 100644
--- a/openssl-sys/src/ossl111.rs
+++ b/openssl-sys/src/ossl111.rs
@@ -25,7 +25,7 @@ pub type SSL_custom_ext_parse_cb_ex =
                                 chainidx: size_t, al: *mut c_int,
                                 parse_arg: *mut c_void) -> c_int>;
 
-pub const SSL_COOKIE_LENGTH: c_int = 255;
+pub const SSL_COOKIE_LENGTH: c_int = 4096;
 
 pub const SSL_OP_ENABLE_MIDDLEBOX_COMPAT: c_ulong = 0x00100000;
 
@@ -65,4 +65,20 @@ extern "C" {
                                   parse_arg: *mut c_void) -> c_int;
     pub fn SSL_stateless(s: *mut ::SSL) -> c_int;
     pub fn SSL_CIPHER_get_handshake_digest(cipher: *const ::SSL_CIPHER) -> *const ::EVP_MD;
+    pub fn SSL_CTX_set_stateless_cookie_generate_cb(
+        s: *mut ::SSL_CTX,
+        cb: Option<unsafe extern "C" fn(
+            ssl: *mut ::SSL,
+            cookie: *mut c_uchar,
+            cookie_len: *mut size_t
+        ) -> c_int>
+    );
+    pub fn SSL_CTX_set_stateless_cookie_verify_cb(
+        s: *mut ::SSL_CTX,
+        cb: Option<unsafe extern "C" fn(
+            ssl: *mut ::SSL,
+            cookie: *const c_uchar,
+            cookie_len: size_t
+        ) -> c_int>
+    );
 }
diff --git a/openssl/src/ssl/callbacks.rs b/openssl/src/ssl/callbacks.rs
index 5b95ed02..bff71022 100644
--- a/openssl/src/ssl/callbacks.rs
+++ b/openssl/src/ssl/callbacks.rs
@@ -366,6 +366,55 @@ where
     callback(ssl, line);
 }
 
+#[cfg(ossl111)]
+pub extern "C" fn raw_stateless_cookie_generate<F>(
+    ssl: *mut ffi::SSL,
+    cookie: *mut c_uchar,
+    cookie_len: *mut size_t,
+) -> c_int
+where
+    F: Fn(&mut SslRef, &mut [u8]) -> Result<usize, ErrorStack> + 'static + Sync + Send,
+{
+    unsafe {
+        let ssl_ctx = ffi::SSL_get_SSL_CTX(ssl as *const _);
+        let callback = ffi::SSL_CTX_get_ex_data(ssl_ctx, get_callback_idx::<F>());
+        let ssl = SslRef::from_ptr_mut(ssl);
+        let callback = &*(callback as *mut F);
+        let slice =
+            slice::from_raw_parts_mut(cookie as *mut u8, ffi::SSL_COOKIE_LENGTH as usize);
+        match callback(ssl, slice) {
+            Ok(len) => {
+                *cookie_len = len as size_t;
+                1
+            }
+            Err(e) => {
+                e.put();
+                0
+            }
+        }
+    }
+}
+
+#[cfg(ossl111)]
+pub extern "C" fn raw_stateless_cookie_verify<F>(
+    ssl: *mut ffi::SSL,
+    cookie: *const c_uchar,
+    cookie_len: size_t,
+) -> c_int
+where
+    F: Fn(&mut SslRef, &[u8]) -> bool + 'static + Sync + Send,
+{
+    unsafe {
+        let ssl_ctx = ffi::SSL_get_SSL_CTX(ssl as *const _);
+        let callback = ffi::SSL_CTX_get_ex_data(ssl_ctx, get_callback_idx::<F>());
+        let ssl = SslRef::from_ptr_mut(ssl);
+        let callback = &*(callback as *mut F);
+        let slice =
+            slice::from_raw_parts(cookie as *const c_uchar as *const u8, cookie_len as usize);
+        callback(ssl, slice) as c_int
+    }
+}
+
 pub extern "C" fn raw_cookie_generate<F>(
     ssl: *mut ffi::SSL,
     cookie: *mut c_uchar,
diff --git a/openssl/src/ssl/mod.rs b/openssl/src/ssl/mod.rs
index f3c4ed3a..024e4ca5 100644
--- a/openssl/src/ssl/mod.rs
+++ b/openssl/src/ssl/mod.rs
@@ -1437,8 +1437,9 @@ impl SslContextBuilder {
     /// The callback will be called with the SSL context and a slice into which the cookie
     /// should be written. The callback should return the number of bytes written.
     ///
-    /// This corresponds to `SSL_CTX_set_cookie_generate_cb`.
-    pub fn set_cookie_generate_cb<F>(&mut self, callback: F)
+    /// This corresponds to `SSL_CTX_set_stateless_cookie_generate_cb`.
+    #[cfg(ossl111)]
+    pub fn set_stateless_cookie_generate_cb<F>(&mut self, callback: F)
     where
         F: Fn(&mut SslRef, &mut [u8]) -> Result<usize, ErrorStack> + 'static + Sync + Send,
     {
@@ -1447,9 +1448,9 @@ impl SslContextBuilder {
             ffi::SSL_CTX_set_ex_data(
                 self.as_ptr(),
                 get_callback_idx::<F>(),
-                mem::transmute(callback),
+                Box::into_raw(callback) as *mut _,
             );
-            ffi::SSL_CTX_set_cookie_generate_cb(self.as_ptr(), Some(raw_cookie_generate::<F>))
+            ffi::SSL_CTX_set_stateless_cookie_generate_cb(self.as_ptr(), Some(raw_stateless_cookie_generate::<F>))
         }
     }
 
@@ -1461,6 +1462,49 @@ impl SslContextBuilder {
     /// Note that the OpenSSL implementation independently verifies the integrity of
     /// application cookies using an HMAC before invoking the supplied callback.
     ///
+    /// This corresponds to `SSL_CTX_set_stateless_cookie_verify_cb`.
+    #[cfg(ossl111)]
+    pub fn set_stateless_cookie_verify_cb<F>(&mut self, callback: F)
+    where
+        F: Fn(&mut SslRef, &[u8]) -> bool + 'static + Sync + Send,
+    {
+        unsafe {
+            let callback = Box::new(callback);
+            ffi::SSL_CTX_set_ex_data(
+                self.as_ptr(),
+                get_callback_idx::<F>(),
+                Box::into_raw(callback) as *mut _,
+            );
+            ffi::SSL_CTX_set_stateless_cookie_verify_cb(self.as_ptr(), Some(raw_stateless_cookie_verify::<F>))
+        }
+    }
+
+    /// Sets the callback for generating a DTLSv1 cookie
+    ///
+    /// The callback will be called with the SSL context and a slice into which the cookie
+    /// should be written. The callback should return the number of bytes written.
+    ///
+    /// This corresponds to `SSL_CTX_set_cookie_generate_cb`.
+    pub fn set_cookie_generate_cb<F>(&mut self, callback: F)
+    where
+        F: Fn(&mut SslRef, &mut [u8]) -> Result<usize, ErrorStack> + 'static + Sync + Send,
+    {
+        unsafe {
+            let callback = Box::new(callback);
+            ffi::SSL_CTX_set_ex_data(
+                self.as_ptr(),
+                get_callback_idx::<F>(),
+                Box::into_raw(callback) as *mut _,
+            );
+            ffi::SSL_CTX_set_cookie_generate_cb(self.as_ptr(), Some(raw_cookie_generate::<F>))
+        }
+    }
+
+    /// Sets the callback for verifying a DTLSv1 cookie
+    ///
+    /// The callback will be called with the SSL context and the cookie supplied by the
+    /// client. It should return true if and only if the cookie is valid.
+    ///
     /// This corresponds to `SSL_CTX_set_cookie_verify_cb`.
     pub fn set_cookie_verify_cb<F>(&mut self, callback: F)
     where
@@ -1471,7 +1515,7 @@ impl SslContextBuilder {
             ffi::SSL_CTX_set_ex_data(
                 self.as_ptr(),
                 get_callback_idx::<F>(),
-                mem::transmute(callback),
+                Box::into_raw(callback) as *mut _,
             );
             ffi::SSL_CTX_set_cookie_verify_cb(self.as_ptr(), Some(raw_cookie_verify::<F>))
         }