diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -4,6 +4,11 @@
 
 ## Released changes
 
+### Version 0.0.1.2
+
+- assure process is not terminated too early
+- upgrade PlantUML to 2023.06
+
 ### Version 0.0.1.1
 
 - assure proper shutdown of Java (PlantUML)
diff --git a/call-plantuml.cabal b/call-plantuml.cabal
--- a/call-plantuml.cabal
+++ b/call-plantuml.cabal
@@ -1,11 +1,11 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.35.0.
+-- This file has been generated from package.yaml by hpack version 0.35.1.
 --
 -- see: https://github.com/sol/hpack
 
 name:           call-plantuml
-version:        0.0.1.1
+version:        0.0.1.2
 synopsis:       A simple library to call PlantUML given a diagram specification
 description:    Please see the README on GitHub at <https://github.com/marcellussiegburg/call-plantuml#readme>
 category:       Graphics, Language
@@ -13,7 +13,7 @@
 bug-reports:    https://github.com/marcellussiegburg/call-plantuml/issues
 author:         Marcellus Siegburg
 maintainer:     marcellus.siegburg@uni-due.de
-copyright:      2022 Marcellus Siegburg
+copyright:      2022-2023 Marcellus Siegburg
 license:        MIT
 license-file:   LICENSE
 build-type:     Simple
diff --git a/data/plantuml.jar b/data/plantuml.jar
# file too large to diff: data/plantuml.jar
diff --git a/src/Language/PlantUML/Call.hs b/src/Language/PlantUML/Call.hs
--- a/src/Language/PlantUML/Call.hs
+++ b/src/Language/PlantUML/Call.hs
@@ -125,7 +125,6 @@
         hPutStr hin content
         hFlush hin
         hClose hin
-        waitForProcess ph
   (out, err) <- fst <$> concurrently
     (concurrently (hGetContents hout) (hGetContents herr))
     evaluatePlantUml