diff --git a/src/fluidimage/gui/imviewer.py b/src/fluidimage/gui/imviewer.py
index dd93e679..4b9b27c8 100644
--- a/src/fluidimage/gui/imviewer.py
+++ b/src/fluidimage/gui/imviewer.py
@@ -15,6 +15,7 @@
 
 import matplotlib.pyplot as plt
 
+import fluidimage
 from fluiddyn.io.image import imread
 from fluiddyn.util import time_as_str
 from fluiddyn.util.serieofarrays import SerieOfArraysFromFiles
@@ -62,7 +63,12 @@ def parse_args():
         "-cm", "--colormap", help="colormap", type=str, default=""
     )
     parser.add_argument("-v", "--verbose", help="verbose mode", action="count")
-
+    parser.add_argument(
+        "-V",
+        "--version",
+        help="Print fluidimage version and exit",
+        action="count",
+    )
     return parser.parse_args()
 
 
@@ -309,4 +315,9 @@ def onclick(self, event):
 
 def main():
     args = parse_args()
+
+    if args.version:
+        print(f"fluidimage {fluidimage.__version__}")
+        return
+
     ImageViewer(args)
diff --git a/src/fluidimage/gui/monitor.py b/src/fluidimage/gui/monitor.py
index cc983a6e..d6085d8f 100644
--- a/src/fluidimage/gui/monitor.py
+++ b/src/fluidimage/gui/monitor.py
@@ -30,6 +30,7 @@
     Tree,
 )
 
+import fluidimage
 from fluidimage import ParamContainer
 
 
@@ -98,7 +99,12 @@ def parse_args(cls):
         parser.add_argument(
             "-v", "--verbose", help="verbose mode", action="count"
         )
-
+        parser.add_argument(
+            "-V",
+            "--version",
+            help="Print fluidimage version and exit",
+            action="count",
+        )
         return parser.parse_args()
 
     def __init__(self, args):
@@ -270,5 +276,10 @@ def on_tree_node_selected(self, event):
 def main():
     """Main function for fluidimage-monitor"""
     args = MonitorApp.parse_args()
+
+    if args.version:
+        print(f"fluidimage {fluidimage.__version__}")
+        return
+
     app = MonitorApp(args)
     app.run()
diff --git a/src/fluidimage/gui/piv_viewer.py b/src/fluidimage/gui/piv_viewer.py
index bcc13dce..5ba0ef0b 100644
--- a/src/fluidimage/gui/piv_viewer.py
+++ b/src/fluidimage/gui/piv_viewer.py
@@ -16,6 +16,7 @@
 import h5py
 import matplotlib.pyplot as plt
 
+import fluidimage
 from fluiddyn.util.serieofarrays import SerieOfArraysFromFiles
 from fluidimage.gui.base_matplotlib import AppMatplotlibWidgets
 
@@ -84,7 +85,12 @@ def parse_args(cls):
         parser.add_argument(
             "-v", "--verbose", help="verbose mode", action="count"
         )
-
+        parser.add_argument(
+            "-V",
+            "--version",
+            help="Print fluidimage version and exit",
+            action="count",
+        )
         return parser.parse_args()
 
     def __init__(self, args):
@@ -208,4 +214,9 @@ def _update_fig(self):
 
 def main():
     args = VectorFieldsViewer.parse_args()
+
+    if args.version:
+        print(f"fluidimage {fluidimage.__version__}")
+        return
+
     return VectorFieldsViewer(args)
diff --git a/src/fluidimage/gui/test_imviewer.py b/src/fluidimage/gui/test_imviewer.py
index d1b24f4d..cd30fe01 100644
--- a/src/fluidimage/gui/test_imviewer.py
+++ b/src/fluidimage/gui/test_imviewer.py
@@ -1,42 +1,46 @@
 import sys
-import unittest
 
-from fluiddyn.io import stdout_redirected
 from fluidimage import get_path_image_samples
-from fluidimage.gui.imviewer import ImageViewer, parse_args
+from fluidimage.gui.imviewer import ImageViewer, main, parse_args
 
 path_image_samples = get_path_image_samples()
 
 
-class TestImageViewer(unittest.TestCase):
-    def test_main(self):
-        with stdout_redirected():
-            command = "fluidimviewer"
-            args = command.split()
-            args.append(str(path_image_samples / "Karman/Images"))
-            sys.argv = args
-            args = parse_args()
-            ImageViewer(args)
+def test_fluidimviewer_version(monkeypatch):
+    command = "fluidimviewer --version"
+    with monkeypatch.context() as ctx:
+        ctx.setattr(sys, "argv", command.split())
+        main()
 
-            args = command.split()
-            args.append(str(path_image_samples / "Karman/Images/*"))
-            sys.argv = args
 
-            args = parse_args()
-            self = ImageViewer(args)
+def test_main(monkeypatch):
 
-            self.set_autoclim(None)
+    words = ["fluidimviewer", str(path_image_samples / "Karman/Images")]
+    with monkeypatch.context() as ctx:
+        ctx.setattr(sys, "argv", words)
+        args = parse_args()
 
-            self._switch()
-            self._switch()
+    ImageViewer(args)
 
-            self._increase_ifile()
-            self._decrease_ifile()
+    words = ["fluidimviewer", str(path_image_samples / "Karman/Images/*")]
+    with monkeypatch.context() as ctx:
+        ctx.setattr(sys, "argv", words)
+        args = parse_args()
 
-            self._submit_n("2")
+    viewer = ImageViewer(args)
 
-            self._increase_ifile_n()
-            self._decrease_ifile_n()
+    viewer.set_autoclim(None)
 
-            self._change_cmin("1")
-            self._change_cmax("2")
+    viewer._switch()
+    viewer._switch()
+
+    viewer._increase_ifile()
+    viewer._decrease_ifile()
+
+    viewer._submit_n("2")
+
+    viewer._increase_ifile_n()
+    viewer._decrease_ifile_n()
+
+    viewer._change_cmin("1")
+    viewer._change_cmax("2")
diff --git a/src/fluidimage/gui/test_monitor.py b/src/fluidimage/gui/test_monitor.py
index 7b3cacf8..c159ede6 100644
--- a/src/fluidimage/gui/test_monitor.py
+++ b/src/fluidimage/gui/test_monitor.py
@@ -24,6 +24,14 @@ def test_monitor_help(monkeypatch):
             raise RuntimeError
 
 
+def test_monitor_version(monkeypatch):
+    command = "fluidimage-monitor --version"
+
+    with monkeypatch.context() as ctx:
+        ctx.setattr(sys, "argv", command.split())
+        main()
+
+
 def test_monitor_bad_paths(monkeypatch, tmp_path):
 
     command = "fluidimage-monitor __dir_does_not_exist__"
diff --git a/src/fluidimage/gui/test_piv_viewer.py b/src/fluidimage/gui/test_piv_viewer.py
index e38d92a6..df04b613 100644
--- a/src/fluidimage/gui/test_piv_viewer.py
+++ b/src/fluidimage/gui/test_piv_viewer.py
@@ -4,6 +4,13 @@
 from fluidimage.gui.piv_viewer import main
 
 
+def test_fluidpivviewer_version(monkeypatch):
+    command = "fluidpivviewer --version"
+    with monkeypatch.context() as ctx:
+        ctx.setattr(sys, "argv", command.split())
+        main()
+
+
 def test_main(monkeypatch):
 
     path_image_samples = get_path_image_samples()