diff --git a/diktat-analysis.yml b/diktat-analysis.yml
index 9a021df9c1..101bcf658a 100644
--- a/diktat-analysis.yml
+++ b/diktat-analysis.yml
@@ -10,7 +10,7 @@
     # or: "1, 2, 3, 4, 5, 6"
     disabledChapters: ""
     testDirs: test
-    kotlinVersion: 1.7
+    kotlinVersion: 1.8
     srcDirectories: "main"
 # Checks that the Class/Enum/Interface name matches Pascal case
 - name: CLASS_NAME_INCORRECT
diff --git a/diktat-rules/src/main/resources/diktat-analysis-huawei.yml b/diktat-rules/src/main/resources/diktat-analysis-huawei.yml
index ef15dc4405..6a901b175f 100644
--- a/diktat-rules/src/main/resources/diktat-analysis-huawei.yml
+++ b/diktat-rules/src/main/resources/diktat-analysis-huawei.yml
@@ -7,7 +7,7 @@
     # testDirs: test
     disabledChapters: ""
     testDirs: test
-    kotlinVersion: 1.7
+    kotlinVersion: 1.8
     srcDirectories: "main"
 # Checks that the Class/Enum/Interface name matches Pascal case
 - name: CLASS_NAME_INCORRECT
diff --git a/diktat-rules/src/main/resources/diktat-analysis.yml b/diktat-rules/src/main/resources/diktat-analysis.yml
index 0eb0e0cf8c..ca09aa67e6 100644
--- a/diktat-rules/src/main/resources/diktat-analysis.yml
+++ b/diktat-rules/src/main/resources/diktat-analysis.yml
@@ -7,7 +7,7 @@
     # expected values:  disabledChapters: "Naming, Comments, General, Variables, Functions, Classes"
     # or: "1, 2, 3, 4, 5, 6"
     disabledChapters: ""
-    kotlinVersion: 1.7
+    kotlinVersion: 1.8
     srcDirectories: "main"
 # Checks that the Class/Enum/Interface name matches Pascal case
 - name: CLASS_NAME_INCORRECT
diff --git a/examples/gradle-groovy-dsl/diktat-analysis.yml b/examples/gradle-groovy-dsl/diktat-analysis.yml
index 0eb0e0cf8c..ca09aa67e6 100644
--- a/examples/gradle-groovy-dsl/diktat-analysis.yml
+++ b/examples/gradle-groovy-dsl/diktat-analysis.yml
@@ -7,7 +7,7 @@
     # expected values:  disabledChapters: "Naming, Comments, General, Variables, Functions, Classes"
     # or: "1, 2, 3, 4, 5, 6"
     disabledChapters: ""
-    kotlinVersion: 1.7
+    kotlinVersion: 1.8
     srcDirectories: "main"
 # Checks that the Class/Enum/Interface name matches Pascal case
 - name: CLASS_NAME_INCORRECT
diff --git a/examples/gradle-kotlin-dsl-multiproject/diktat-analysis.yml b/examples/gradle-kotlin-dsl-multiproject/diktat-analysis.yml
index 0eb0e0cf8c..ca09aa67e6 100644
--- a/examples/gradle-kotlin-dsl-multiproject/diktat-analysis.yml
+++ b/examples/gradle-kotlin-dsl-multiproject/diktat-analysis.yml
@@ -7,7 +7,7 @@
     # expected values:  disabledChapters: "Naming, Comments, General, Variables, Functions, Classes"
     # or: "1, 2, 3, 4, 5, 6"
     disabledChapters: ""
-    kotlinVersion: 1.7
+    kotlinVersion: 1.8
     srcDirectories: "main"
 # Checks that the Class/Enum/Interface name matches Pascal case
 - name: CLASS_NAME_INCORRECT
diff --git a/examples/gradle-kotlin-dsl/diktat-analysis.yml b/examples/gradle-kotlin-dsl/diktat-analysis.yml
index 0eb0e0cf8c..ca09aa67e6 100644
--- a/examples/gradle-kotlin-dsl/diktat-analysis.yml
+++ b/examples/gradle-kotlin-dsl/diktat-analysis.yml
@@ -7,7 +7,7 @@
     # expected values:  disabledChapters: "Naming, Comments, General, Variables, Functions, Classes"
     # or: "1, 2, 3, 4, 5, 6"
     disabledChapters: ""
-    kotlinVersion: 1.7
+    kotlinVersion: 1.8
     srcDirectories: "main"
 # Checks that the Class/Enum/Interface name matches Pascal case
 - name: CLASS_NAME_INCORRECT
diff --git a/examples/maven/diktat-analysis.yml b/examples/maven/diktat-analysis.yml
index 0eb0e0cf8c..ca09aa67e6 100644
--- a/examples/maven/diktat-analysis.yml
+++ b/examples/maven/diktat-analysis.yml
@@ -7,7 +7,7 @@
     # expected values:  disabledChapters: "Naming, Comments, General, Variables, Functions, Classes"
     # or: "1, 2, 3, 4, 5, 6"
     disabledChapters: ""
-    kotlinVersion: 1.7
+    kotlinVersion: 1.8
     srcDirectories: "main"
 # Checks that the Class/Enum/Interface name matches Pascal case
 - name: CLASS_NAME_INCORRECT