diff --git a/build.gradle.kts b/build.gradle.kts
index 571760180..f6ee1a9c7 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -133,7 +133,7 @@ val toObfuscate: Configuration by configurations.creating {
 val obfuscationLibs: Configuration by configurations.creating
 
 
-val mixcrAlgoVersion = "4.4.0-10-develop"
+val mixcrAlgoVersion = "4.4.0-11-tag-sequence-quality-fix"
 val milibVersion = "3.1.0-2-master"
 val mitoolVersion = ""
 val repseqioVersion = ""
diff --git a/src/main/kotlin/com/milaboratory/mixcr/cli/CommandRefineTagsAndSort.kt b/src/main/kotlin/com/milaboratory/mixcr/cli/CommandRefineTagsAndSort.kt
index 9eb901bcc..569efb680 100644
--- a/src/main/kotlin/com/milaboratory/mixcr/cli/CommandRefineTagsAndSort.kt
+++ b/src/main/kotlin/com/milaboratory/mixcr/cli/CommandRefineTagsAndSort.kt
@@ -341,7 +341,7 @@ object CommandRefineTagsAndSort {
                                 "This procedure don't support aggregated tags. " +
                                         "Please run tag correction for *.vdjca files produced by 'align'."
                             )
-                            val tagTuple = als.tagCount.tuples().iterator().next()
+                            val tagTuple = als.tagCount.singletonTuple
                             Array(tagNames.size) { tIdx -> // <- local index for the procedure
                                 val tagValue = tagTuple[tIdx]
                                 if (correctionEnabled[tIdx]) (tagValue as SequenceAndQualityTagValue).data