diff --git a/data-prepper-plugins/s3-sink/src/main/java/org/opensearch/dataprepper/plugins/sink/s3/configuration/ClientOptions.java b/data-prepper-plugins/s3-sink/src/main/java/org/opensearch/dataprepper/plugins/sink/s3/configuration/ClientOptions.java
index 76947bdee6..a5e83948a5 100644
--- a/data-prepper-plugins/s3-sink/src/main/java/org/opensearch/dataprepper/plugins/sink/s3/configuration/ClientOptions.java
+++ b/data-prepper-plugins/s3-sink/src/main/java/org/opensearch/dataprepper/plugins/sink/s3/configuration/ClientOptions.java
@@ -6,7 +6,9 @@
 package org.opensearch.dataprepper.plugins.sink.s3.configuration;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
+import jakarta.validation.constraints.Max;
 import jakarta.validation.constraints.Min;
+import org.hibernate.validator.constraints.time.DurationMax;
 import org.hibernate.validator.constraints.time.DurationMin;
 
 import java.time.Duration;
@@ -17,10 +19,12 @@ public class ClientOptions {
 
     @JsonProperty("max_connections")
     @Min(1)
+    @Max(5000)
     private int maxConnections = DEFAULT_MAX_CONNECTIONS;
 
     @JsonProperty("acquire_timeout")
     @DurationMin(seconds = 1)
+    @DurationMax(seconds = 3600)
     private Duration acquireTimeout = DEFAULT_ACQUIRE_TIMEOUT;
 
     public int getMaxConnections() {