diff --git a/pyproject.toml b/pyproject.toml
index afbba7c0..60cc397c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,9 +2,9 @@
 requires = [
     'setuptools>=64',
     'setuptools-scm[toml]>=8',
-    "xtrack==0.66.0",
+    "xtrack==0.66.1",
     "xfields==0.20.3",
-    "xcoll==0.5.0",
+    "xcoll==0.5.1",
     "xobjects==0.4.4",
     "xdeps==0.6.3",
     "xpart==0.18.6",
@@ -25,9 +25,9 @@ readme = "README.md"
 requires-python = ">=3.8"
 license = {file = "LICENSE"}
 dependencies = [
-    "xtrack==0.66.0",
+    "xtrack==0.66.1",
     "xfields==0.20.3",
-    "xcoll==0.5.0",
+    "xcoll==0.5.1",
     "xobjects==0.4.4",
     "xdeps==0.6.3",
     "xpart==0.18.6",