diff --git a/src/battle_asserts/issues/docker_builder.clj b/src/battle_asserts/issues/docker_builder.clj
index e68358a2..5066557a 100644
--- a/src/battle_asserts/issues/docker_builder.clj
+++ b/src/battle_asserts/issues/docker_builder.clj
@@ -5,7 +5,7 @@
 
 (def level :easy)
 
-(def tags ["strings" "devops" "codebattle"])
+(def tags ["strings" "codebattle"])
 
 (def description
   {:en "Create a function, that create docker build command from `language`, `version` and `path` (which can be empty string) for codebattle."
diff --git a/src/battle_asserts/issues/sort_elements_by_frequency.clj b/src/battle_asserts/issues/sort_elements_by_frequency.clj
index 9765f4a6..f69d0b6a 100644
--- a/src/battle_asserts/issues/sort_elements_by_frequency.clj
+++ b/src/battle_asserts/issues/sort_elements_by_frequency.clj
@@ -3,7 +3,7 @@
 
 (def level :easy)
 
-(def tags ["collections" "sorting"])
+(def tags ["collections" "sorting" "algorithms"])
 
 (def description
   {:en "Given an array of integers, sort the array according to frequency of elements.
diff --git a/src/battle_asserts/issues/zigzag_conversion.clj b/src/battle_asserts/issues/zigzag_conversion.clj
index 65f43254..4b938de1 100644
--- a/src/battle_asserts/issues/zigzag_conversion.clj
+++ b/src/battle_asserts/issues/zigzag_conversion.clj
@@ -7,7 +7,7 @@
 
 (def disabled true)
 
-(def tags ["strings"])
+(def tags ["strings" "decryption"])
 
 (def description
   {:en "The string \"PAYPALISHIRING\" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)