diff --git a/pyproject.toml b/pyproject.toml
index b0eef5b..2607902 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ readme = "README.md"
 requires-python = ">=3.8"
 dependencies = [
     "ruamel.yaml",
-    "pint_pulsar==1.0.1",
+    "pint_pulsar>=1.1.1",
     "enterprise-pulsar>=3.3.2",
     "enterprise-extensions>=v2.4.1",
     "pytest",
@@ -29,7 +29,7 @@ dependencies = [
     "numpy",
     "weasyprint",
     "pytest-xdist[psutil]>=2.3.0",
-    "jupyter",
+    "notebook",
     "seaborn",
     "gitpython",
 ]
diff --git a/src/pint_pal/noise_utils.py b/src/pint_pal/noise_utils.py
index bca27bd..968b48a 100644
--- a/src/pint_pal/noise_utils.py
+++ b/src/pint_pal/noise_utils.py
@@ -432,7 +432,7 @@ def add_noise_to_model(model, burn_frac = 0.25, save_corner = True, no_corner_pl
     #Setup and validate the timing model to ensure things are correct
     model.setup()
     model.validate()
-    model.noise_mtime = mtime.isot
+    model.meta['noise_mtime'] = mtime.isot
 
     if convert_equad_to_t2:
         from pint_pal.lite_utils import convert_enterprise_equads
diff --git a/src/pint_pal/timingconfiguration.py b/src/pint_pal/timingconfiguration.py
index e605b9e..1c7c721 100644
--- a/src/pint_pal/timingconfiguration.py
+++ b/src/pint_pal/timingconfiguration.py
@@ -157,9 +157,9 @@ def get_model_and_toas(self,usepickle=True,print_all_ignores=False,apply_initial
         m = model.get_model(par_path,allow_name_mixing=True)
         match = re.search(r"#\s+Created:\s+(\S+)", open(par_path).read())
         if match:
-            m.created_time = match.group(1)
-            log.info(f"Par file created: {m.created_time}")
-        m.file_mtime = Time(os.path.getmtime(par_path), format="unix").isot
+            m.meta['created_time'] = match.group(1)
+            log.info(f"Par file created: {m.meta['created_time']}")
+        m.meta['file_mtime'] = Time(os.path.getmtime(par_path), format="unix").isot
 
 
         if m.PSR.value != self.get_source():