diff --git a/templates/configmap-env.yaml b/templates/configmap-env.yaml
index 5c400db..265bd41 100644
--- a/templates/configmap-env.yaml
+++ b/templates/configmap-env.yaml
@@ -15,6 +15,7 @@ data:
   DB_NAME: {{ .Values.postgresql.auth.database }}
   DB_POOL: {{ include "mastodon.maxDbPool" . }}
   DB_USER: {{ .Values.postgresql.auth.username }}
+  PREPARED_STATEMENTS: {{ .Values.mastodon.preparedStatements | quote }}
   DEFAULT_LOCALE: {{ .Values.mastodon.locale }}
   {{- if .Values.elasticsearch.enabled }}
   ES_ENABLED: "true"
diff --git a/values.yaml b/values.yaml
index 10c7785..711f000 100644
--- a/values.yaml
+++ b/values.yaml
@@ -202,6 +202,9 @@ mastodon:
       # -- Enable statsd publishing via STATSD_ADDR environment variable
       address: ""
 
+  # Sets the PREPARED_STATEMENTS environment variable: https://docs.joinmastodon.org/admin/config/#prepared_statements
+  preparedStatements: true
+
 ingress:
   enabled: true
   annotations: