diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -2,6 +2,13 @@
 
 `tmp-proc-zipkin` uses [PVP Versioning][1].
 
+## 0.8.0.0 -- 2026-10-18
+
+* Extend the upper bound for tmp-proc to allow 0.8
+* Add `uriOfRootlessWith` to `TmpZipkin` for rootless docker support
+* Fix `toSettings` to use `hUri` instead of `hAddr` so that both ping and
+  connection work in rootless mode
+
 ## 0.7.0.0 -- 2024-05-12
 
 * Extend the upper bound for tmp-proc to allow 0.7
diff --git a/src/System/TmpProc/Docker/Zipkin.hs b/src/System/TmpProc/Docker/Zipkin.hs
--- a/src/System/TmpProc/Docker/Zipkin.hs
+++ b/src/System/TmpProc/Docker/Zipkin.hs
@@ -36,8 +36,7 @@
 import Control.Monad.Trace.Class (MonadTrace, alwaysSampled, rootSpan)
 import qualified Data.ByteString.Char8 as C8
 import Data.Proxy (Proxy (..))
-import Data.String (fromString)
-import qualified Data.Text as Text
+import Monitor.Tracing.Zipkin (defaultSettings, settingsHostname, settingsPort)
 import qualified Monitor.Tracing.Zipkin as ZPK
 import Network.HTTP.Client (HttpException)
 import System.IO
@@ -55,6 +54,8 @@
   , Proc (..)
   , ProcHandle (..)
   , SvcURI
+  , addrHost
+  , addrPort
   , only
   , startupAll
   , toPinged
@@ -88,6 +89,10 @@
     ZPK.run tracedPing z
     ZPK.publish z
   reset _ = pure ()
+  uriOfRootlessWith addr pairs =
+    case lookup 9411 pairs of
+      Just hp -> "http://" <> addrPort addr hp <> "/"
+      Nothing -> mkUri' addr
 
 
 {- | Specifies how to connect to a tmp @ZipKin@ service.
@@ -103,11 +108,23 @@
 
 -- | Make a simple HTTP uri to the zipkin server.
 mkUri' :: HostIpAddress -> SvcURI
-mkUri' ip = "http://" <> C8.pack (Text.unpack ip) <> "/"
+mkUri' ip = "http://" <> addrHost ip <> "/"
 
 
 toSettings :: ProcHandle TmpZipkin -> ZPK.Settings
-toSettings = fromString . Text.unpack . hAddr
+toSettings h =
+  let uri = C8.unpack $ hUri h
+      -- strip "http://" prefix and trailing "/"
+      stripped = reverse . dropWhile (== '/') . reverse . drop 7 $ uri
+      (hostname, portPart) = break (== ':') stripped
+   in defaultSettings
+        { settingsHostname = Just hostname
+        , settingsPort = case drop 1 portPart of
+            [] -> Nothing
+            portStr -> case reads portStr of
+              [(p, "")] -> Just (fromIntegral (p :: Int))
+              _ -> Nothing
+        }
 
 
 pingAction :: IO ()
diff --git a/tmp-proc-zipkin.cabal b/tmp-proc-zipkin.cabal
--- a/tmp-proc-zipkin.cabal
+++ b/tmp-proc-zipkin.cabal
@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               tmp-proc-zipkin
-version:            0.7.0.0
+version:            0.8.0.0
 synopsis:           Launch ZipKin in docker using tmp-proc
 description:
   Demos how to use tmp-proc to run ZipKin in docker in a unittest.
@@ -31,7 +31,7 @@
     , bytestring   >=0.10.8.2 && <0.12.2
     , http-client  >=0.5.13.1 && <0.8.0.0
     , text         >=1.2.3 && <2.2
-    , tmp-proc     >=0.5.3  && <0.8
+    , tmp-proc     >=0.5.3  && <0.9
     , tracing      >=0.0.7.2  && <0.1.0
 
   default-language: Haskell2010