diff --git a/exercises/_template/build.gradle b/exercises/_template/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/_template/build.gradle
+++ b/exercises/_template/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/accumulate/build.gradle b/exercises/accumulate/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/accumulate/build.gradle
+++ b/exercises/accumulate/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/acronym/build.gradle b/exercises/acronym/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/acronym/build.gradle
+++ b/exercises/acronym/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/allergies/build.gradle b/exercises/allergies/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/allergies/build.gradle
+++ b/exercises/allergies/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/anagram/build.gradle b/exercises/anagram/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/anagram/build.gradle
+++ b/exercises/anagram/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/atbash-cipher/build.gradle b/exercises/atbash-cipher/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/atbash-cipher/build.gradle
+++ b/exercises/atbash-cipher/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/beer-song/build.gradle b/exercises/beer-song/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/beer-song/build.gradle
+++ b/exercises/beer-song/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/binary-search/build.gradle b/exercises/binary-search/build.gradle
index 323006a6..968d78af 100644
--- a/exercises/binary-search/build.gradle
+++ b/exercises/binary-search/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/binary/build.gradle b/exercises/binary/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/binary/build.gradle
+++ b/exercises/binary/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/bob/build.gradle b/exercises/bob/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/bob/build.gradle
+++ b/exercises/bob/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/bracket-push/build.gradle b/exercises/bracket-push/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/bracket-push/build.gradle
+++ b/exercises/bracket-push/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/change/build.gradle b/exercises/change/build.gradle
index ff2e6f19..52f16405 100644
--- a/exercises/change/build.gradle
+++ b/exercises/change/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/difference-of-squares/build.gradle b/exercises/difference-of-squares/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/difference-of-squares/build.gradle
+++ b/exercises/difference-of-squares/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/etl/build.gradle b/exercises/etl/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/etl/build.gradle
+++ b/exercises/etl/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/flatten-array/build.gradle b/exercises/flatten-array/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/flatten-array/build.gradle
+++ b/exercises/flatten-array/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/gigasecond/build.gradle b/exercises/gigasecond/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/gigasecond/build.gradle
+++ b/exercises/gigasecond/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/grade-school/build.gradle b/exercises/grade-school/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/grade-school/build.gradle
+++ b/exercises/grade-school/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/hamming/build.gradle b/exercises/hamming/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/hamming/build.gradle
+++ b/exercises/hamming/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/hello-world/build.gradle b/exercises/hello-world/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/hello-world/build.gradle
+++ b/exercises/hello-world/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/hexadecimal/build.gradle b/exercises/hexadecimal/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/hexadecimal/build.gradle
+++ b/exercises/hexadecimal/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/isogram/build.gradle b/exercises/isogram/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/isogram/build.gradle
+++ b/exercises/isogram/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/largest-series-product/build.gradle b/exercises/largest-series-product/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/largest-series-product/build.gradle
+++ b/exercises/largest-series-product/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/leap/build.gradle b/exercises/leap/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/leap/build.gradle
+++ b/exercises/leap/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/linked-list/build.gradle b/exercises/linked-list/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/linked-list/build.gradle
+++ b/exercises/linked-list/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/luhn/build.gradle b/exercises/luhn/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/luhn/build.gradle
+++ b/exercises/luhn/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/nth-prime/build.gradle b/exercises/nth-prime/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/nth-prime/build.gradle
+++ b/exercises/nth-prime/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/nucleotide-count/build.gradle b/exercises/nucleotide-count/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/nucleotide-count/build.gradle
+++ b/exercises/nucleotide-count/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/pangram/build.gradle b/exercises/pangram/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/pangram/build.gradle
+++ b/exercises/pangram/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/pascals-triangle/build.gradle b/exercises/pascals-triangle/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/pascals-triangle/build.gradle
+++ b/exercises/pascals-triangle/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/perfect-numbers/build.gradle b/exercises/perfect-numbers/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/perfect-numbers/build.gradle
+++ b/exercises/perfect-numbers/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/phone-number/build.gradle b/exercises/phone-number/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/phone-number/build.gradle
+++ b/exercises/phone-number/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/pig-latin/build.gradle b/exercises/pig-latin/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/pig-latin/build.gradle
+++ b/exercises/pig-latin/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/raindrops/build.gradle b/exercises/raindrops/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/raindrops/build.gradle
+++ b/exercises/raindrops/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/react/build.gradle b/exercises/react/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/react/build.gradle
+++ b/exercises/react/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/rna-transcription/build.gradle b/exercises/rna-transcription/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/rna-transcription/build.gradle
+++ b/exercises/rna-transcription/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/robot-name/build.gradle b/exercises/robot-name/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/robot-name/build.gradle
+++ b/exercises/robot-name/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/roman-numerals/build.gradle b/exercises/roman-numerals/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/roman-numerals/build.gradle
+++ b/exercises/roman-numerals/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/scrabble-score/build.gradle b/exercises/scrabble-score/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/scrabble-score/build.gradle
+++ b/exercises/scrabble-score/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/series/build.gradle b/exercises/series/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/series/build.gradle
+++ b/exercises/series/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/sieve/build.gradle b/exercises/sieve/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/sieve/build.gradle
+++ b/exercises/sieve/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/simple-cipher/build.gradle b/exercises/simple-cipher/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/simple-cipher/build.gradle
+++ b/exercises/simple-cipher/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/space-age/build.gradle b/exercises/space-age/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/space-age/build.gradle
+++ b/exercises/space-age/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/strain/build.gradle b/exercises/strain/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/strain/build.gradle
+++ b/exercises/strain/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }
diff --git a/exercises/triangle/build.gradle b/exercises/triangle/build.gradle
index 469ff5aa..5e2b02a2 100644
--- a/exercises/triangle/build.gradle
+++ b/exercises/triangle/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = '1.0.6'
+    ext.kotlin_version = '1.1.1'
     repositories {
         mavenCentral()
     }
diff --git a/exercises/word-count/build.gradle b/exercises/word-count/build.gradle
index 2cd9ad1c..16c36c06 100644
--- a/exercises/word-count/build.gradle
+++ b/exercises/word-count/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.1.1'
   repositories {
     mavenCentral()
   }