diff --git a/jsonnet/kube-prometheus/kube-prometheus-thanos-sidecar.libsonnet b/jsonnet/kube-prometheus/kube-prometheus-thanos-sidecar.libsonnet
index 56c94e79d36d693b67d72fe2c4b782b20494cfa4..ebe9872b12fdabfadd3551dc605d780ed86f9efb 100644
--- a/jsonnet/kube-prometheus/kube-prometheus-thanos-sidecar.libsonnet
+++ b/jsonnet/kube-prometheus/kube-prometheus-thanos-sidecar.libsonnet
@@ -8,7 +8,7 @@ local servicePort = k.core.v1.service.mixin.spec.portsType;
       thanos: 'v0.7.0',
     },
     imageRepos+:: {
-      thanos: quay.io/thanos/thanos',
+      thanos: 'quay.io/thanos/thanos',
     },
     thanos+:: {
       objectStorageConfig: {