diff --git a/README b/README
index fb881317..dbcec5f2 100644
--- a/README
+++ b/README
@@ -77,7 +77,7 @@ Self documentation of the source code is regularly extracted from the current
 Git sources and is available from this web page:
   http://www.nongnu.org/lwip/
 
-There is now a constantly growin wiki about lwIP at
+There is now a constantly growing wiki about lwIP at
   http://lwip.wikia.com/wiki/LwIP_Wiki
 
 Also, there are mailing lists you can subscribe at
diff --git a/UPGRADING b/UPGRADING
index cfd90f33..ea0c93f1 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -78,7 +78,7 @@ with newer versions.
   * support PBUF_REF for RX packets
   * LWIP_NETCONN_FULLDUPLEX allows netconn/sockets to be used for reading/writing from separate
     threads each (needs LWIP_NETCONN_SEM_PER_THREAD)
-  * Moved and reorderd stats (mainly memp/mib2)
+  * Moved and reordered stats (mainly memp/mib2)
 
 (1.4.0)
 
diff --git a/doc/contrib.txt b/doc/contrib.txt
index fa11dfec..6f0d7bc5 100644
--- a/doc/contrib.txt
+++ b/doc/contrib.txt
@@ -39,7 +39,7 @@ features of Savannah help us not lose users' input.
    bugtracker at Savannah.
 3. If you have a fix put the patch on Savannah. If it is a patch that affects
    both core and arch specific stuff please separate them so that the core can
-   be applied separately while leaving the other patch 'open'. The prefered way
+   be applied separately while leaving the other patch 'open'. The preferred way
    is to NOT touch archs you can't test and let maintainers take care of them.
    This is a good way to see if they are used at all - the same goes for unix
    netifs except tapif.