diff --git a/src/protocol-detail/challenge.cpp b/src/protocol-detail/challenge.cpp
index aa0d884..3504115 100644
--- a/src/protocol-detail/challenge.cpp
+++ b/src/protocol-detail/challenge.cpp
@@ -59,5 +59,5 @@
   }
 }
 
-}  // namespace ndncert
-}  // namespace ndn
+} // namespace ndncert
+} // namespace ndn
diff --git a/src/protocol-detail/challenge.hpp b/src/protocol-detail/challenge.hpp
index 23a9d84..a506346 100644
--- a/src/protocol-detail/challenge.hpp
+++ b/src/protocol-detail/challenge.hpp
@@ -36,7 +36,7 @@
   decodeDataContent(const Block& data, RequesterState& state);
 };
 
-}  // namespace ndncert
-}  // namespace ndn
+} // namespace ndncert
+} // namespace ndn
 
 #endif // NDNCERT_PROTOCOL_DETAIL_HPP
\ No newline at end of file
diff --git a/src/protocol-detail/error.cpp b/src/protocol-detail/error.cpp
index dabfa6a..79dc535 100644
--- a/src/protocol-detail/error.cpp
+++ b/src/protocol-detail/error.cpp
@@ -44,5 +44,5 @@
   return std::make_tuple(error, readString(block.get(tlv_error_info)));
 }
 
-}  // namespace ndncert
-}  // namespace ndn
+} // namespace ndncert
+} // namespace ndn
diff --git a/src/protocol-detail/error.hpp b/src/protocol-detail/error.hpp
index 8a2cda0..bfda70c 100644
--- a/src/protocol-detail/error.hpp
+++ b/src/protocol-detail/error.hpp
@@ -41,7 +41,7 @@
   decodefromDataContent(const Block& block);
 };
 
-}  // namespace ndncert
-}  // namespace ndn
+} // namespace ndncert
+} // namespace ndn
 
 #endif // NDNCERT_PROTOCOL_ERROR_HPP
\ No newline at end of file
diff --git a/src/protocol-detail/info.cpp b/src/protocol-detail/info.cpp
index 822ea84..08a6997 100644
--- a/src/protocol-detail/info.cpp
+++ b/src/protocol-detail/info.cpp
@@ -77,5 +77,5 @@
   return result;
 }
 
-}  // namespace ndncert
-}  // namespace ndn
\ No newline at end of file
+} // namespace ndncert
+} // namespace ndn
\ No newline at end of file
diff --git a/src/protocol-detail/info.hpp b/src/protocol-detail/info.hpp
index d34c0a2..83214c9 100644
--- a/src/protocol-detail/info.hpp
+++ b/src/protocol-detail/info.hpp
@@ -41,7 +41,7 @@
   decodeDataContent(const Block& block);
 };
 
-}  // namespace ndncert
-}  // namespace ndn
+} // namespace ndncert
+} // namespace ndn
 
 #endif // NDNCERT_PROTOCOL_DETAIL_HPP
\ No newline at end of file
diff --git a/src/protocol-detail/new-renew-revoke.cpp b/src/protocol-detail/new-renew-revoke.cpp
index 3ce3ac0..2fecb4d 100644
--- a/src/protocol-detail/new-renew-revoke.cpp
+++ b/src/protocol-detail/new-renew-revoke.cpp
@@ -109,5 +109,5 @@
   return DecodedData{ecdhKey, saltInt, requestId, requestStatus, challenges};
 }
 
-}  // namespace ndncert
-}  // namespace ndn
\ No newline at end of file
+} // namespace ndncert
+} // namespace ndn
\ No newline at end of file
diff --git a/src/protocol-detail/new-renew-revoke.hpp b/src/protocol-detail/new-renew-revoke.hpp
index f9710b8..ee393b1 100644
--- a/src/protocol-detail/new-renew-revoke.hpp
+++ b/src/protocol-detail/new-renew-revoke.hpp
@@ -49,7 +49,7 @@
   decodeDataContent(const Block& content);
 };
 
-}  // namespace ndncert
-}  // namespace ndn
+} // namespace ndncert
+} // namespace ndn
 
 #endif // NDNCERT_PROTOCOL_DETAIL_NEW_RENEW_REVOKE_HPP
\ No newline at end of file
diff --git a/src/protocol-detail/probe.cpp b/src/protocol-detail/probe.cpp
index 8132e28..517a15e 100644
--- a/src/protocol-detail/probe.cpp
+++ b/src/protocol-detail/probe.cpp
@@ -102,5 +102,5 @@
   }
 }
 
-}  // namespace ndncert
-}  // namespace ndn
\ No newline at end of file
+} // namespace ndncert
+} // namespace ndn
\ No newline at end of file
diff --git a/src/protocol-detail/probe.hpp b/src/protocol-detail/probe.hpp
index e6ff022..c973c07 100644
--- a/src/protocol-detail/probe.hpp
+++ b/src/protocol-detail/probe.hpp
@@ -46,7 +46,7 @@
   decodeApplicationParameters(const Block& block);
 };
 
-}  // namespace ndncert
-}  // namespace ndn
+} // namespace ndncert
+} // namespace ndn
 
-#endif  // NDNCERT_PROTOCOL_DETAIL_HPP
\ No newline at end of file
+#endif // NDNCERT_PROTOCOL_DETAIL_HPP
\ No newline at end of file