diff --git a/build.sbt b/build.sbt
index 88915e12..631c8951 100644
--- a/build.sbt
+++ b/build.sbt
@@ -4,7 +4,7 @@ ThisBuild / startYear := Some(2004)
 // I thought we could declare these in `ThisBuild` scope but no :-/
 val commonSettings = Seq(
   versionScheme := Some("early-semver"),
-  versionPolicyIntention := Compatibility.BinaryCompatible,
+  versionPolicyIntention := Compatibility.BinaryAndSourceCompatible,
 )
 
 lazy val root = project.in(file("."))
diff --git a/docs/Getting_Started.md b/docs/Getting_Started.md
index aa25ba3a..cd1b0f1c 100644
--- a/docs/Getting_Started.md
+++ b/docs/Getting_Started.md
@@ -15,7 +15,7 @@ Here’s what the parser looks like:
     }
 
 
-The package [scala.util.parsing.combinator](https://javadoc.io/static/org.scala-lang.modules/scala-parser-combinators_2.13/2.0.0/scala/util/parsing/combinator/index.html) contains all of the interesting stuff. Our parser extends [RegexParsers](https://javadoc.io/static/org.scala-lang.modules/scala-parser-combinators_2.13/2.0.0/scala/util/parsing/combinator/RegexParsers.html) because we do some lexical analysis. `"""[a-z]+""".r` is the regular expression. `^^` is [documented](https://javadoc.io/static/org.scala-lang.modules/scala-parser-combinators_2.13/2.0.0/scala/util/parsing/combinator/Parsers$Parser.html#^^[U](f:T=>U):Parsers.this.Parser[U]) to be "a parser combinator for function application". Basically, if the parsing on the left of the `^^` succeeds, the function on the right is executed. If you've done yacc parsing, the left hand side of the ^^ corresponds to the grammar rule and the right hand side corresponds to the code generated by the rule. Since the method "word" returns a Parser of type String, the function on the right of `^^` needs to return a String.
+The package [scala.util.parsing.combinator](https://javadoc.io/static/org.scala-lang.modules/scala-parser-combinators_2.13/2.1.0/scala/util/parsing/combinator/index.html) contains all of the interesting stuff. Our parser extends [RegexParsers](https://javadoc.io/static/org.scala-lang.modules/scala-parser-combinators_2.13/2.1.0/scala/util/parsing/combinator/RegexParsers.html) because we do some lexical analysis. `"""[a-z]+""".r` is the regular expression. `^^` is [documented](https://javadoc.io/static/org.scala-lang.modules/scala-parser-combinators_2.13/2.1.0/scala/util/parsing/combinator/Parsers$Parser.html#^^[U](f:T=>U):Parsers.this.Parser[U]) to be "a parser combinator for function application". Basically, if the parsing on the left of the `^^` succeeds, the function on the right is executed. If you've done yacc parsing, the left hand side of the ^^ corresponds to the grammar rule and the right hand side corresponds to the code generated by the rule. Since the method "word" returns a Parser of type String, the function on the right of `^^` needs to return a String.
 
 So how do we use this parser? Well, if we want to extract a word from string, we can call