diff --git a/tests/tests.sh b/tests/tests.sh
index ccfc23b..c2c531f 100755
--- a/tests/tests.sh
+++ b/tests/tests.sh
@@ -207,6 +207,27 @@ testUrlDecodingBackslashes()
     assertContains "Verify whether 'wcurl' successfully uses the default filename when the URL ends with a slash" "${ret}" '--output filename%5Cwith%2Fbackslashes%5c%2f'
 }
 
+testUrlDecodingColon()
+{
+    url='example.com/filename%3Awith%3Acolons%3a'
+    ret=$(${WCURL_CMD} ${url} 2>&1 | tr '\n' ' ')
+    assertContains "Verify whether 'wcurl' successfully uses the default filename when the URL ends with a slash" "${ret}" '--output filename%3Awith%3Acolons%3a'
+}
+
+testUrlEncodeColon()
+{
+    url='example.com/filename:with:colons:'
+    ret=$(${WCURL_CMD} ${url} 2>&1 | tr '\n' ' ')
+    assertContains "Verify whether 'wcurl' successfully uses the default filename when the URL ends with a slash" "${ret}" '--output filename%3Awith%3Acolons%3A'
+}
+
+testUrlAllowColonWhenOutput()
+{
+    url='example.com/filename:with:colons:'
+    ret=$(${WCURL_CMD} ${url} -o "i:want:colons:here" 2>&1 | tr '\n' ' ')
+    assertContains "Verify whether 'wcurl' successfully uses the default filename when the URL ends with a slash" "${ret}" '--output i:want:colons:here'
+}
+
 # Test decoding a bunch of different languages (that do not use the latin
 # alphabet), we could split each language on its own test, but for now it
 # does not make a difference.
diff --git a/wcurl b/wcurl
index c5dd6d1..45fd5ca 100755
--- a/wcurl
+++ b/wcurl
@@ -118,7 +118,8 @@ readonly PER_URL_PARAMETERS="\
 # characters.
 # 2F = /
 # 5C = \
-readonly UNSAFE_PERCENT_ENCODE="%2F %5C"
+# 3A = :
+readonly UNSAFE_PERCENT_ENCODE="%2F %5C %3A"
 
 # Whether to invoke curl or not.
 DRY_RUN="false"
@@ -193,7 +194,8 @@ get_url_filename()
     # If what remains contains a slash, there is a path; return it percent-decoded.
     case "${hostname_and_path}" in
         # sed to remove everything preceding the last '/', e.g.: "example/something" becomes "something"
-        */*) percent_decode "$(printf %s "${hostname_and_path}" | sed -e 's,^.*/,,')" ;;
+        # sed to also replace ':' with the percent_encoded %3A
+        */*) percent_decode "$(printf %s "${hostname_and_path}" | sed -e 's,^.*/,,' -e 's,:,%3A,g')" ;;
     esac
     # No slash means there was just a hostname and no path; return empty string.
 }