diff --git a/api-ref/source/conf.py b/api-ref/source/conf.py
index 90ac41c..799a88c 100755
--- a/api-ref/source/conf.py
+++ b/api-ref/source/conf.py
@@ -115,7 +115,7 @@ html_copy_source = False
 latex_documents = [
     ('index',
      'asm-api-ref.tex',
-     u'Application Service Mesh - API Reference',
+    u'Application Service Mesh - API Reference',
      u'OpenTelekomCloud', 'manual'),
 ]
 
diff --git a/doc/best-practice/source/conf.py b/doc/best-practice/source/conf.py
index 41a713c..741dbd1 100644
--- a/doc/best-practice/source/conf.py
+++ b/doc/best-practice/source/conf.py
@@ -115,7 +115,7 @@ html_copy_source = False
 latex_documents = [
     ('index',
      'asm-best-practice.tex',
-     u'Application Service Mesh - Best Practice',
+    u'Application Service Mesh - Best Practice',
      u'OpenTelekomCloud', 'manual'),
 ]
 
diff --git a/umn/source/conf.py b/umn/source/conf.py
index 230285f..19de327 100644
--- a/umn/source/conf.py
+++ b/umn/source/conf.py
@@ -115,7 +115,7 @@ html_copy_source = False
 latex_documents = [
     ('index',
      'asm-umn.tex',
-     u'Application Service Mesh - User Guide',
+    u'Application Service Mesh - User Guide',
      u'OpenTelekomCloud', 'manual'),
 ]