diff --git a/repo/pyproject.toml b/repo/pyproject.toml
index bf9dbc84..edb043ce 100644
--- a/repo/pyproject.toml
+++ b/repo/pyproject.toml
@@ -11,8 +11,8 @@ name = "tuf-on-ci"
 description = "TUF-on-CI repository tools, intended to be executed on a CI system"
 readme = "README.md"
 dependencies = [
-  "securesystemslib[awskms, azurekms, gcpkms, sigstore, pynacl] ~= 0.31.0",
-  "tuf ~= 3.1",
+  "securesystemslib[awskms, azurekms, gcpkms, sigstore, pynacl] ~= 1.1.0",
+  "tuf ~= 5.1",
   "click ~= 8.1",
 ]
 requires-python = ">=3.10"
diff --git a/signer/pyproject.toml b/signer/pyproject.toml
index d5956325..4bb76fd3 100644
--- a/signer/pyproject.toml
+++ b/signer/pyproject.toml
@@ -9,8 +9,8 @@ readme = "README.md"
 dependencies = [
   "packaging >= 23.2,< 25.0",
   "platformdirs ~= 4.2",
-  "securesystemslib[awskms,azurekms,gcpkms,hsm,sigstore] ~= 0.31.0",
-  "tuf ~= 3.1",
+  "securesystemslib[awskms,azurekms,gcpkms,hsm,sigstore] >= 0.31,< 1.2",
+  "tuf >= 3.1,< 6.0",
   "click ~= 8.1",
 ]
 requires-python = ">=3.10"