diff --git a/Dockerfile b/Dockerfile
index 5195445..1b72abc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,12 +12,12 @@ ENV PATH=/opt/conda/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:
 # Installing necessary packages
 
 # Installing basicpy and other pip packages
-RUN pip --no-cache-dir install basicpy==1.2.0 bioformats_jar 'scikit-image>=0.21.0'
+RUN pip --no-cache-dir install basicpy==1.2.0 bioformats_jar 'scikit-image>=0.21.0' 'hyperactive<5'
 
 # Pre-fetch bioformats jars to a world-readable location.
 # Force TLS 1.2 to work around a Java bug in the JDK version in this container.
 RUN env JAVA_TOOL_OPTIONS='-Dhttps.protocols=TLSv1.2' \
-    python -c 'import bfio; bfio.start()' \
+    python -c 'import bioformats_jar; bioformats_jar.get_loci()' \
     && mv /root/.jgo /root/.m2 /tmp \
     && chmod -R a+rwX /tmp/.jgo /tmp/.m2
 ENV HOME=/tmp
diff --git a/main.py b/main.py
index 9f4009a..ee95624 100755
--- a/main.py
+++ b/main.py
@@ -159,6 +159,20 @@ def get_args():
         default=1e4,
         help="Relative weight of the l0 norm cost in the Fourier domain for autotuning.",
     )
+    optional.add_argument(
+        "--output-flatfield",
+        dest="output_flatfield",
+        required=False,
+        default=None,
+        help="Filename for flatfield output. If empty will default to {input filename}. A sufix will be added to differenciate between flatfield and darkfield.",
+    )
+    optional.add_argument(
+        "--output-darkfield",
+        dest="output_darkfield",
+        required=False,
+        default=None,
+        help="Filename for darkfield output. If empty will default to {input filename}. A sufix will be added to differenciate between flatfield and darkfield.",
+    )
 
     arg = parser.parse_args()
 
@@ -166,6 +180,12 @@ def get_args():
     arg.input = Path(arg.input)
     arg.output_folder = Path(arg.output_folder)
 
+    if arg.output_flatfield is None:
+        arg.output_flatfield = splitext(arg.input.name)[0]
+
+    if arg.output_darkfield is None:
+        arg.output_darkfield = splitext(arg.input.name)[0]
+
     return arg
 
 
@@ -254,8 +274,8 @@ def main(args):
     darkfields = np.moveaxis(np.array(darkfields), 0, -1)
 
     # Get output file names, splitext gets the file name without the extension
-    flatfield_path = args.output_folder / f"{splitext(args.input.name)[0]}-ffp.tiff"
-    darkfield_path = args.output_folder / f"{splitext(args.input.name)[0]}-dfp.tiff"
+    flatfield_path = args.output_folder / f"{args.output_flatfield}-ffp.tiff"
+    darkfield_path = args.output_folder / f"{args.output_darkfield}-dfp.tiff"
 
     # Save flatfields and darkfields
     imsave(flatfield_path, flatfields, check_contrast=False)