diff --git a/README.md b/README.md
index 89e0c3d..eec3039 100644
--- a/README.md
+++ b/README.md
@@ -57,4 +57,4 @@ this to resume interrupted tailers so that no information is lost.
 
 ### 0.4
 
-Add support for [tokumx](http://www.tokutek.com/products/tokumx-for-mongodb/). Backwards incompatible changes to persistent tailers to accomodate that. See [UPGRADING.md](UPGRADING.md).
+Add support for [tokumx](http://www.tokutek.com/products/tokumx-for-mongodb/). Backwards incompatible changes to persistent tailers to accommodate that. See [UPGRADING.md](UPGRADING.md).
diff --git a/UPGRADING.md b/UPGRADING.md
index 55c265d..b6f6e83 100644
--- a/UPGRADING.md
+++ b/UPGRADING.md
@@ -2,7 +2,7 @@
 
 ## Outline
 
-This version adds support for tailing TokuMX, which uses a different oplog format from Mongo, separating the concepts of time and ordering of oplog entries. This sadly breaks most applications currently using mongoriver and will require invasive changes to persistant tailers.
+This version adds support for tailing TokuMX, which uses a different oplog format from Mongo, separating the concepts of time and ordering of oplog entries. This sadly breaks most applications currently using mongoriver and will require invasive changes to persistent tailers.
 
 More specifically - TokuMX uses `BSON::Binary` instead of `BSON::Timestamp` for keeping track of the database oplog position.