diff --git a/environment.yml b/environment.yml
index 6885aee8..a805fd08 100644
--- a/environment.yml
+++ b/environment.yml
@@ -22,5 +22,5 @@ dependencies:
     - zodb
     - mechanize
     - browser-cookie3
-    - pyqt5
+    - pyqt6=6.8.0
     - pyqtgraph==0.12.4
diff --git a/pyproject.toml b/pyproject.toml
index 71748977..ac63570f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,8 +27,8 @@ dependencies = [
     "scipy==1.11.4",
     "zodb",
     "zeo",
-    "pyqtgraph==0.12.4",
-    "pyqt5",
+    "pyqtgraph==0.13.7",
+    "pyqt6==6.8.0",
 ]
 
 # needed for setuptools_scm, we don't define a static version