diff --git a/dangerzone/container.py b/dangerzone/container.py
index 2e416cb..622106d 100644
--- a/dangerzone/container.py
+++ b/dangerzone/container.py
@@ -85,7 +85,8 @@ def convert(input_filename, output_filename, ocr_lang, stdout_callback):
         "-v",
         f"{pixel_dir}:/dangerzone",
         container_name,
-        "dangerzone.py",
+        "/usr/bin/python3",
+        "/usr/local/bin/dangerzone.py",
         "document-to-pixels",
     ]
     ret = exec_container(args, stdout_callback)
@@ -110,7 +111,8 @@ def convert(input_filename, output_filename, ocr_lang, stdout_callback):
             "-e",
             f"OCR_LANGUAGE={ocr_lang}",
             container_name,
-            "dangerzone.py",
+            "/usr/bin/python3",
+            "/usr/local/bin/dangerzone.py",
             "pixels-to-pdf",
         ]
         ret = exec_container(args, stdout_callback)
diff --git a/dangerzone/global_common.py b/dangerzone/global_common.py
index d55b91f..3ab8886 100644
--- a/dangerzone/global_common.py
+++ b/dangerzone/global_common.py
@@ -485,7 +485,7 @@ class GlobalCommon(object):
             print(f"Deleting old dangerzone container image")
 
             subprocess.check_output(
-                [self.get_container_runtime(), "rmi", found_image_id],
+                [self.get_container_runtime(), "rmi", "--force", found_image_id],
                 startupinfo=self.get_subprocess_startupinfo(),
             )