diff --git a/charts/postgres-cluster/Chart.yaml b/charts/postgres-cluster/Chart.yaml
index 1d2657d..7d267f2 100644
--- a/charts/postgres-cluster/Chart.yaml
+++ b/charts/postgres-cluster/Chart.yaml
@@ -1,6 +1,6 @@
 apiVersion: v2
 name: postgres-cluster
-version: 2.3.2
+version: 2.3.3
 description: Chart for cloudnative-pg cluster
 keywords:
   - database
diff --git a/charts/postgres-cluster/templates/_bootstrap.tpl b/charts/postgres-cluster/templates/_bootstrap.tpl
index 75e0626..12455e2 100644
--- a/charts/postgres-cluster/templates/_bootstrap.tpl
+++ b/charts/postgres-cluster/templates/_bootstrap.tpl
@@ -26,7 +26,8 @@ bootstrap:
     import:
       type: {{ .Values.replica.importType }}
       databases:
-        {{- if and ((len .Values.replica.importDatabases) gt 1) (.Values.replica.importType eq "microservice") }}
+        {{ $length := len .Values.replica.importDatabases | int }}
+        {{- if and ($length gt 1) (.Values.replica.importType eq "microservice") }}
           {{ fail "Too many databases in import type of microservice!" }}
         {{- else}}
         {{- with .Values.replica.importDatabases }}