diff --git a/docker-compose-dev.yml b/docker-compose-dev.yml
index 75812346..5641f3e1 100644
--- a/docker-compose-dev.yml
+++ b/docker-compose-dev.yml
@@ -60,6 +60,7 @@ services:
       # - S3_SECRET_ACCESS_KEY=
       # - S3_BUCKET=
       # - S3_FORCE_PATH_STYLE=true
+      # - S3_REQUEST_CHECKSUM_CALCULATION=
 
       # - OIDC_ISSUER=
       # - OIDC_CLIENT_ID=
diff --git a/docker-compose.yml b/docker-compose.yml
index 9829ad35..d572bc8e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -76,6 +76,7 @@ services:
       # - S3_SECRET_ACCESS_KEY__FILE=/run/secrets/s3_secret_access_key
       # - S3_BUCKET=
       # - S3_FORCE_PATH_STYLE=true
+      # - S3_REQUEST_CHECKSUM_CALCULATION=
 
       # - OIDC_ISSUER=
       # - OIDC_CLIENT_ID=
diff --git a/server/.env.sample b/server/.env.sample
index 46dae16c..c3263b32 100644
--- a/server/.env.sample
+++ b/server/.env.sample
@@ -51,6 +51,7 @@ SECRET_KEY=notsecretkey
 # S3_SECRET_ACCESS_KEY=
 # S3_BUCKET=
 # S3_FORCE_PATH_STYLE=true
+# S3_REQUEST_CHECKSUM_CALCULATION=
 
 # OIDC_ISSUER=
 # OIDC_CLIENT_ID=
diff --git a/server/api/hooks/s3/index.js b/server/api/hooks/s3/index.js
index 5168ae8e..0e69925d 100644
--- a/server/api/hooks/s3/index.js
+++ b/server/api/hooks/s3/index.js
@@ -29,7 +29,7 @@ module.exports = function defineS3Hook(sails) {
 
       sails.log.info('Initializing custom hook (`s3`)');
 
-      client = new S3Client({
+      const config = {
         endpoint: sails.config.custom.s3Endpoint,
         region: sails.config.custom.s3Region || 'eu-central-1',
         credentials: {
@@ -37,7 +37,13 @@ module.exports = function defineS3Hook(sails) {
           secretAccessKey: sails.config.custom.s3SecretAccessKey,
         },
         forcePathStyle: sails.config.custom.s3ForcePathStyle,
-      });
+      };
+
+      if (sails.config.custom.s3RequestChecksumCalculation) {
+        config.requestChecksumCalculation = sails.config.custom.s3RequestChecksumCalculation;
+      }
+
+      client = new S3Client(config);
     },
 
     getClient() {
diff --git a/server/config/custom.js b/server/config/custom.js
index 5db04627..4422fd79 100644
--- a/server/config/custom.js
+++ b/server/config/custom.js
@@ -72,6 +72,7 @@ module.exports.custom = {
   s3SecretAccessKey: process.env.S3_SECRET_ACCESS_KEY,
   s3Bucket: process.env.S3_BUCKET,
   s3ForcePathStyle: process.env.S3_FORCE_PATH_STYLE === 'true',
+  s3RequestChecksumCalculation: process.env.S3_REQUEST_CHECKSUM_CALCULATION,
 
   oidcIssuer: process.env.OIDC_ISSUER,
   oidcClientId: process.env.OIDC_CLIENT_ID,