diff --git a/docs/requirements.txt b/docs/requirements.txt
index 2ee51ed2..21914bad 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,7 +1,7 @@
 markdown
 mkdocs
 mkdocs-gen-files
-mkdocs-jupyter
+mkdocs-jupyter==0.25.0
 mkdocs-literate-nav
 mkdocs-material
 mkdocs-section-index
diff --git a/src/dolphin/_cli_timeseries.py b/src/dolphin/_cli_timeseries.py
index 480441a6..567904e2 100644
--- a/src/dolphin/_cli_timeseries.py
+++ b/src/dolphin/_cli_timeseries.py
@@ -62,7 +62,6 @@ def get_parser(subparser=None, subcommand_name="timeseries") -> argparse.Argumen
             "A file with the same size as each raster, like amplitude dispersion or "
             "temporal coherence to find reference point"
         ),
-        required=True,
     )
     parser.add_argument(
         "--condition",
diff --git a/src/dolphin/timeseries.py b/src/dolphin/timeseries.py
index 03007602..7c6855a2 100644
--- a/src/dolphin/timeseries.py
+++ b/src/dolphin/timeseries.py
@@ -964,7 +964,7 @@ def invert_unw_network(
     cor_vrt_name = Path(output_dir) / "cor_network.vrt"
     conncomp_vrt_name = Path(output_dir) / "conncomp_network.vrt"
 
-    if conncomp_file_list is not None:
+    if conncomp_file_list is not None and method == "L2":
         conncomp_reader = io.VRTStack(
             file_list=conncomp_file_list,
             outfile=conncomp_vrt_name,
@@ -973,7 +973,7 @@ def invert_unw_network(
         )
         readers = [unw_reader, conncomp_reader]
         logger.info("Masking unw pixels during inversion using connected components.")
-    elif cor_file_list is not None:
+    elif cor_file_list is not None and method == "L2":
         cor_reader = io.VRTStack(
             file_list=cor_file_list, outfile=cor_vrt_name, skip_size_check=True
         )