diff --git a/compiler/src/dotty/tools/repl/JLineTerminal.scala b/compiler/src/dotty/tools/repl/JLineTerminal.scala
index 3376714e5bee..70f5950b4b4f 100644
--- a/compiler/src/dotty/tools/repl/JLineTerminal.scala
+++ b/compiler/src/dotty/tools/repl/JLineTerminal.scala
@@ -9,6 +9,7 @@ import dotty.tools.dotc.util.SourceFile
 import org.jline.reader
 import org.jline.reader.Parser.ParseContext
 import org.jline.reader._
+import org.jline.reader.impl.LineReaderImpl
 import org.jline.reader.impl.history.DefaultHistory
 import org.jline.terminal.TerminalBuilder
 import org.jline.utils.AttributedString
@@ -60,6 +61,8 @@ final class JLineTerminal extends java.io.Closeable {
                                                 // this is supplied from the EOFError.getMissing() method
       .variable(LIST_MAX, 400)                  // Ask user when number of completions exceed this limit (default is 100).
       .variable(BLINK_MATCHING_PAREN, 0L)       // Don't blink the opening paren after typing a closing paren.
+      .variable(WORDCHARS,
+        LineReaderImpl.DEFAULT_WORDCHARS.filterNot("*?.[]~=/&;!#%^(){}<>".toSet)) // Finer grained word boundaries
       .option(INSERT_TAB, true)                 // At the beginning of the line, insert tab instead of completing.
       .option(AUTO_FRESH_LINE, true)            // if not at start of line before prompt, move to new line.
       .option(DISABLE_EVENT_EXPANSION, true)    // don't process escape sequences in input
@@ -76,6 +79,8 @@ final class JLineTerminal extends java.io.Closeable {
       val highlighted = SyntaxHighlighting.highlight(buffer)
       AttributedString.fromAnsi(highlighted)
     }
+    def setErrorPattern(errorPattern: java.util.regex.Pattern): Unit = {}
+    def setErrorIndex(errorIndex: Int): Unit = {}
   }
 
   /** Provide multi-line editing support */
diff --git a/project/Build.scala b/project/Build.scala
index e3f75a733f7a..a0a7a7046ac7 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -493,9 +493,9 @@ object Build {
       libraryDependencies ++= Seq(
         "org.scala-lang.modules" % "scala-asm" % "7.3.1-scala-1", // used by the backend
         Dependencies.`compiler-interface`,
-        "org.jline" % "jline-reader" % "3.9.0",   // used by the REPL
-        "org.jline" % "jline-terminal" % "3.9.0",
-        "org.jline" % "jline-terminal-jna" % "3.9.0" // needed for Windows
+        "org.jline" % "jline-reader" % "3.15.0",   // used by the REPL
+        "org.jline" % "jline-terminal" % "3.15.0",
+        "org.jline" % "jline-terminal-jna" % "3.15.0" // needed for Windows
       ),
 
       // For convenience, change the baseDirectory when running the compiler
diff --git a/project/build.properties b/project/build.properties
index a919a9b5f46b..654fe70c42c7 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.3.8
+sbt.version=1.3.12