diff --git a/README.adoc b/README.adoc
index 13d81de..595d41e 100644
--- a/README.adoc
+++ b/README.adoc
@@ -6,7 +6,7 @@ you can go there for tarball downloads and other resources.
 This code is a forward-port of the Crowther/Woods Adventure 2.5 from
 1995, last version in the main line of Colossal Cave Adventure
 development written by the original authors.  The authors have given
-permission and encouragement for this releasel it obsolesces all
+permission and encouragement for this release it obsolesces all
 the 350-point versions and previous 2.x (430-point) ports.
 
 The file history.adoc contains a more detailed history of this game
diff --git a/adventure.yaml b/adventure.yaml
index 9d83eae..2049775 100644
--- a/adventure.yaml
+++ b/adventure.yaml
@@ -62,7 +62,7 @@
 #
 # arbitrary_messages: These are arguments to rspeak(). Some spans of
 #    these messages need to be kept adjacent and ordered (for now),
-#    though there are no depenencies on actual numbers left.  To see
+#    though there are no dependencies on actual numbers left.  To see
 #    which, grep for rspeak() calls containing expressions with
 #    arithmetic.  Eventually, these will be pulled out into more
 #    appropriate data structures. Then ordering can be dropped.
diff --git a/history.adoc b/history.adoc
index d33f448..807d92d 100644
--- a/history.adoc
+++ b/history.adoc
@@ -2,7 +2,7 @@
 by Eric S. Raymond
 
 Adventure is the fons et origo of all later dungeon-crawling computer
-games, the grandaddy of interactive fiction, and one of the hallowed
+games, the granddaddy of interactive fiction, and one of the hallowed
 artifacts of hacker folklore.
 
 == Origin and history ==
diff --git a/make_dungeon.py b/make_dungeon.py
index 106714a..f5876dd 100755
--- a/make_dungeon.py
+++ b/make_dungeon.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # This is the open-adventure dungeon generator. It consumes a YAML description of
 # the dungeon and outputs a dungeon.h and dungeon.c pair of C code files.
diff --git a/notes.adoc b/notes.adoc
index ea98f65..538de28 100644
--- a/notes.adoc
+++ b/notes.adoc
@@ -177,6 +177,6 @@ We have made exactly one minor architectural change.  In addition to the
 old code's per-object state-description messages, we now have a per-object
 message series for state *changes*.  This makes it possible to pull a fair
 amount of text out of the arbitrary-messages list and associate those
-mesages with the objects that conceptually own them.
+messages with the objects that conceptually own them.
 
 // end