diff --git a/pydocstringformatter/formatting/formatter.py b/pydocstringformatter/formatting/formatter.py
index b576dbb2..f9f0f0a5 100644
--- a/pydocstringformatter/formatting/formatter.py
+++ b/pydocstringformatter/formatting/formatter.py
@@ -65,7 +65,7 @@ class FinalPeriodFormatter(StringAndQuotesFormatter):
     """Add a period to the end of single line docstrings and summaries."""
 
     name = "final-period"
-    END_OF_SENTENCE_PUNCTUATION = {".", "?", "!", "‽"}
+    END_OF_SENTENCE_PUNCTUATION = {".", "?", "!", "‽", ":", ";"}
 
     def _treat_string(
         self,
diff --git a/tests/data/format/final_period/exotic_line_ending.py b/tests/data/format/final_period/exotic_line_ending.py
new file mode 100644
index 00000000..ed87a587
--- /dev/null
+++ b/tests/data/format/final_period/exotic_line_ending.py
@@ -0,0 +1,11 @@
+def function():
+    """Check the name of first argument, expect:
+
+      *'self' for a regular method
+      *'cls' for a class method or a metaclass regular method"""
+
+def function():
+    """This has peculiar line ending;
+
+    but it should not matter.
+                """
diff --git a/tests/data/format/final_period/exotic_line_ending.py.out b/tests/data/format/final_period/exotic_line_ending.py.out
new file mode 100644
index 00000000..302b9cd7
--- /dev/null
+++ b/tests/data/format/final_period/exotic_line_ending.py.out
@@ -0,0 +1,13 @@
+def function():
+    """Check the name of first argument, expect:
+
+      *'self' for a regular method
+      *'cls' for a class method or a metaclass regular method
+    """
+
+def function():
+    """This has peculiar line ending;
+
+    but it should not matter.
+
+    """