diff --git a/doc/1.6.4_ asymmetric.md b/doc/1.6.4_asymmetric.md similarity index 100% rename from doc/1.6.4_ asymmetric.md rename to doc/1.6.4_asymmetric.md diff --git a/doc/1.6.7_ protocol.md b/doc/1.6.7_protocol.md similarity index 100% rename from doc/1.6.7_ protocol.md rename to doc/1.6.7_protocol.md diff --git a/doc/1.6.8_ key_distribution.md b/doc/1.6.8_key_distribution.md similarity index 100% rename from doc/1.6.8_ key_distribution.md rename to doc/1.6.8_key_distribution.md