diff --git a/.gitignore b/.gitignore
index 7b9522c3b7..6b36e2d1d2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,6 +36,8 @@ InvenTree/media
 InvenTree/static
 media
 static
+inventree_media
+inventree_static
 
 # Local config file
 config.yaml
diff --git a/InvenTree/InvenTree/settings.py b/InvenTree/InvenTree/settings.py
index f73a5034ca..c3d646c660 100644
--- a/InvenTree/InvenTree/settings.py
+++ b/InvenTree/InvenTree/settings.py
@@ -213,6 +213,14 @@ AUTH_PASSWORD_VALIDATORS = [
     },
 ]
 
+# Extra (optional) URL validators
+# See https://docs.djangoproject.com/en/2.2/ref/validators/#django.core.validators.URLValidator
+
+EXTRA_URL_SCHEMES = CONFIG.get('extra_url_schemes', [])
+
+if not type(EXTRA_URL_SCHEMES) in [list]:
+    eprint("Warning: extra_url_schemes not correctly formatted")
+    EXTRA_URL_SCHEMES = []
 
 # Internationalization
 # https://docs.djangoproject.com/en/1.10/topics/i18n/
diff --git a/InvenTree/InvenTree/validators.py b/InvenTree/InvenTree/validators.py
index 4fbcf44b1c..98c0532d14 100644
--- a/InvenTree/InvenTree/validators.py
+++ b/InvenTree/InvenTree/validators.py
@@ -2,10 +2,29 @@
 Custom field validators for InvenTree
 """
 
+from django.conf import settings
 from django.core.exceptions import ValidationError
 from django.utils.translation import gettext_lazy as _
 
 
+def allowable_url_schemes():
+    """ Return the list of allowable URL schemes.
+    In addition to the default schemes allowed by Django,
+    the install configuration file (config.yaml) can specify
+    extra schemas """
+
+    # Default schemes
+    schemes = ['http', 'https', 'ftp', 'ftps']
+
+    extra = settings.EXTRA_URL_SCHEMES
+
+    for e in extra:
+        if e.lower() not in schemes:
+            schemes.append(e.lower())
+
+    return schemes
+
+
 def validate_part_name(value):
     """ Prevent some illegal characters in part names.
     """
diff --git a/InvenTree/config_template.yaml b/InvenTree/config_template.yaml
index 1799b49e1a..f362048e35 100644
--- a/InvenTree/config_template.yaml
+++ b/InvenTree/config_template.yaml
@@ -47,7 +47,16 @@ media_root: '../inventree_media'
 # By default it is stored in a directory named 'static' local to the InvenTree directory
 static_root: '../inventree_static'
 
+# Optional URL schemes to allow in URL fields
+# By default, only the following schemes are allowed: ['http', 'https', 'ftp', 'ftps']
+# Uncomment the lines below to allow extra schemes
+#extra_url_schemes:
+#  - mailto
+#  - git
+#  - ssh
+
 # Logging options
+# If debug mode is enabled, set log_queries to True to show aggregate database queries in the debug console
 log_queries: False
 
 # Backup options