diff --git a/helm/reana/templates/reana-server.yaml b/helm/reana/templates/reana-server.yaml
index 30941abb..d2b23d85 100644
--- a/helm/reana/templates/reana-server.yaml
+++ b/helm/reana/templates/reana-server.yaml
@@ -94,6 +94,8 @@ spec:
             value: !!str {{ .Values.kubernetes_jobs_max_user_timeout_limit | default 1209600 }}  # 1209600 seconds = 14 days
           - name: REANA_INTERACTIVE_SESSION_MAX_INACTIVITY_PERIOD
             value: {{ .Values.interactive_sessions.maximum_inactivity_period | default "forever" | quote }}
+          - name: REANA_INTERACTIVE_SESSIONS_ENVIRONMENTS
+            value: {{ .Values.interactive_sessions.environments | toJson | quote }}
           - name: REANA_KUBERNETES_JOBS_TIMEOUT_LIMIT
             value: !!str {{ .Values.kubernetes_jobs_timeout_limit | default 604800 }}  # 604800 seconds = 7 days
           - name: REANA_KUBERNETES_JOBS_MEMORY_LIMIT