diff --git a/development.ini b/development.ini
--- a/development.ini
+++ b/development.ini
@@ -296,6 +296,18 @@ allow_repo_location_change = True
 ## allows to setup custom hooks in settings page
 allow_custom_hooks_settings = True
 
+## extra extensions for indexing, space separated and without the leading '.'.
+# index.extensions =
+#    gemfile
+#    lock
+
+## extra filenames for indexing, space separated
+# index.filenames =
+#    .dockerignore
+#    .editorconfig
+#    INSTALL
+#    CHANGELOG
+
 ####################################
 ###        CELERY CONFIG        ####
 ####################################
diff --git a/kallithea/bin/template.ini.mako b/kallithea/bin/template.ini.mako
--- a/kallithea/bin/template.ini.mako
+++ b/kallithea/bin/template.ini.mako
@@ -293,6 +293,18 @@ allow_repo_location_change = True
 <%text>## allows to setup custom hooks in settings page</%text>
 allow_custom_hooks_settings = True
 
+<%text>## extra extensions for indexing, space separated and without the leading '.'.</%text>
+# index.extensions =
+#    gemfile
+#    lock
+
+<%text>## extra filenames for indexing, space separated</%text>
+# index.filenames =
+#    .dockerignore
+#    .editorconfig
+#    INSTALL
+#    CHANGELOG
+
 <%text>####################################</%text>
 <%text>###        CELERY CONFIG        ####</%text>
 <%text>####################################</%text>
diff --git a/kallithea/config/deployment.ini_tmpl b/kallithea/config/deployment.ini_tmpl
--- a/kallithea/config/deployment.ini_tmpl
+++ b/kallithea/config/deployment.ini_tmpl
@@ -289,6 +289,18 @@ allow_repo_location_change = True
 ## allows to setup custom hooks in settings page
 allow_custom_hooks_settings = True
 
+## extra extensions for indexing, space separated and without the leading '.'.
+# index.extensions =
+#    gemfile
+#    lock
+
+## extra filenames for indexing, space separated
+# index.filenames =
+#    .dockerignore
+#    .editorconfig
+#    INSTALL
+#    CHANGELOG
+
 ####################################
 ###        CELERY CONFIG        ####
 ####################################
diff --git a/kallithea/config/environment.py b/kallithea/config/environment.py
--- a/kallithea/config/environment.py
+++ b/kallithea/config/environment.py
@@ -34,7 +34,7 @@ from kallithea.config.routing import mak
 from kallithea.lib import helpers
 from kallithea.lib.auth import set_available_permissions
 from kallithea.lib.utils import repo2db_mapper, make_ui, set_app_settings,\
-    load_rcextensions, check_git_version, set_vcs_config
+    load_rcextensions, check_git_version, set_vcs_config, set_indexer_config
 from kallithea.lib.utils2 import engine_from_config, str2bool
 from kallithea.lib.db_manage import DbManage
 from kallithea.model import init_model
@@ -130,6 +130,7 @@ def load_environment(global_conf, app_co
     # pylons
     kallithea.CONFIG.update(config)
     set_vcs_config(kallithea.CONFIG)
+    set_indexer_config(kallithea.CONFIG)
 
     #check git version
     check_git_version()
diff --git a/kallithea/lib/utils.py b/kallithea/lib/utils.py
--- a/kallithea/lib/utils.py
+++ b/kallithea/lib/utils.py
@@ -418,6 +418,21 @@ def set_vcs_config(config):
                                                         'utf8'), sep=',')
 
 
+def set_indexer_config(config):
+    """
+    Update Whoosh index mapping
+
+    :param config: kallithea.CONFIG
+    """
+    from kallithea.config import conf
+
+    log.debug('adding extra into INDEX_EXTENSIONS')
+    conf.INDEX_EXTENSIONS.extend(re.split('\s+', config.get('index.extensions', '')))
+
+    log.debug('adding extra into INDEX_FILENAMES')
+    conf.INDEX_FILENAMES.extend(re.split('\s+', config.get('index.filenames', '')))
+
+
 def map_groups(path):
     """
     Given a full path to a repository, create all nested groups that this
diff --git a/kallithea/tests/test.ini b/kallithea/tests/test.ini
--- a/kallithea/tests/test.ini
+++ b/kallithea/tests/test.ini
@@ -297,6 +297,18 @@ allow_repo_location_change = True
 ## allows to setup custom hooks in settings page
 allow_custom_hooks_settings = True
 
+## extra extensions for indexing, space separated and without the leading '.'.
+# index.extensions =
+#    gemfile
+#    lock
+
+## extra filenames for indexing, space separated
+# index.filenames =
+#    .dockerignore
+#    .editorconfig
+#    INSTALL
+#    CHANGELOG
+
 ####################################
 ###        CELERY CONFIG        ####
 ####################################