diff --git a/.gitignore b/.gitignore
index 0465c33..daebd6e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@ xcuserdata
 /kotlin-js-store/yarn.lock
 /test.lyng
 /sample_texts/1.txt.gz
+/kotlin-js-store/wasm/yarn.lock
diff --git a/lynglib/build.gradle.kts b/lynglib/build.gradle.kts
index a4786b9..bbbf46f 100644
--- a/lynglib/build.gradle.kts
+++ b/lynglib/build.gradle.kts
@@ -21,7 +21,7 @@ import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 group = "net.sergeych"
-version = "0.9.3"
+version = "0.9.3-SNAPSHOT"
 
 buildscript {
     repositories {
diff --git a/lynglib/src/commonMain/kotlin/net/sergeych/lyng/obj/ObjException.kt b/lynglib/src/commonMain/kotlin/net/sergeych/lyng/obj/ObjException.kt
index b623c42..8d54608 100644
--- a/lynglib/src/commonMain/kotlin/net/sergeych/lyng/obj/ObjException.kt
+++ b/lynglib/src/commonMain/kotlin/net/sergeych/lyng/obj/ObjException.kt
@@ -166,13 +166,15 @@ open class ObjException(
                 "ClassCastException",
                 "IndexOutOfBoundsException",
                 "IllegalArgumentException",
+                "IllegalStateException",
                 "NoSuchElementException",
                 "IllegalAssignmentException",
                 "SymbolNotDefinedException",
                 "IterationEndException",
                 "AccessException",
                 "UnknownException",
-                "NotFoundException"
+                "NotFoundException",
+                "IllegalOperationException"
             )) {
                 scope.addConst(name, getOrCreateExceptionClass(name))
             }
@@ -197,10 +199,10 @@ class ObjIllegalStateException(scope: Scope, message: String = "illegal state")
 
 @Suppress("unused")
 class ObjNoSuchElementException(scope: Scope, message: String = "no such element") :
-    ObjException("IllegalArgumentException", scope, message)
+    ObjException("NoSuchElementException", scope, message)
 
 class ObjIllegalAssignmentException(scope: Scope, message: String = "illegal assignment") :
-    ObjException("NoSuchElementException", scope, message)
+    ObjException("IllegalAssignmentException", scope, message)
 
 class ObjSymbolNotDefinedException(scope: Scope, message: String = "symbol is not defined") :
     ObjException("SymbolNotDefinedException", scope, message)