diff --git a/codegen/sdk-codegen/aws-models/fis.json b/codegen/sdk-codegen/aws-models/fis.json
index c8667c3ee176..58bd1e6f7e46 100644
--- a/codegen/sdk-codegen/aws-models/fis.json
+++ b/codegen/sdk-codegen/aws-models/fis.json
@@ -1447,7 +1447,7 @@
           }
         },
         "prefix": {
-          "target": "com.amazonaws.fis#S3ObjectKey",
+          "target": "com.amazonaws.fis#ReportConfigurationS3OutputPrefix",
           "traits": {
             "smithy.api#documentation": "<p>The prefix of the S3 bucket where the experiment report will be stored.</p>"
           }
@@ -3922,6 +3922,7 @@
         "smithy.api#paginated": {
           "inputToken": "nextToken",
           "outputToken": "nextToken",
+          "items": "actions",
           "pageSize": "maxResults"
         }
       }
@@ -4003,6 +4004,7 @@
         "smithy.api#paginated": {
           "inputToken": "nextToken",
           "outputToken": "nextToken",
+          "items": "resolvedTargets",
           "pageSize": "maxResults"
         }
       }
@@ -4164,6 +4166,7 @@
         "smithy.api#paginated": {
           "inputToken": "nextToken",
           "outputToken": "nextToken",
+          "items": "experimentTemplates",
           "pageSize": "maxResults"
         }
       }
@@ -4242,6 +4245,7 @@
         "smithy.api#paginated": {
           "inputToken": "nextToken",
           "outputToken": "nextToken",
+          "items": "experiments",
           "pageSize": "maxResults"
         }
       }
@@ -4377,6 +4381,7 @@
         "smithy.api#paginated": {
           "inputToken": "nextToken",
           "outputToken": "nextToken",
+          "items": "targetAccountConfigurations",
           "pageSize": "maxResults"
         }
       }
@@ -4463,6 +4468,7 @@
         "smithy.api#paginated": {
           "inputToken": "nextToken",
           "outputToken": "nextToken",
+          "items": "targetResourceTypes",
           "pageSize": "maxResults"
         }
       }
@@ -4581,7 +4587,7 @@
           }
         },
         "prefix": {
-          "target": "com.amazonaws.fis#S3ObjectKey",
+          "target": "com.amazonaws.fis#ReportConfigurationS3OutputPrefix",
           "traits": {
             "smithy.api#documentation": "<p>The prefix of the S3 bucket where the experiment report will be stored.</p>"
           }
@@ -4601,7 +4607,7 @@
           }
         },
         "prefix": {
-          "target": "com.amazonaws.fis#S3ObjectKey",
+          "target": "com.amazonaws.fis#ReportConfigurationS3OutputPrefix",
           "traits": {
             "smithy.api#documentation": "<p>The prefix of the S3 bucket where the experiment report will be stored.</p>"
           }
@@ -4611,6 +4617,16 @@
         "smithy.api#documentation": "<p>Specifies the S3 destination for the experiment report.</p>"
       }
     },
+    "com.amazonaws.fis#ReportConfigurationS3OutputPrefix": {
+      "type": "string",
+      "traits": {
+        "smithy.api#length": {
+          "min": 0,
+          "max": 256
+        },
+        "smithy.api#pattern": "^[\\S]+$"
+      }
+    },
     "com.amazonaws.fis#ResolvedTarget": {
       "type": "structure",
       "members": {
@@ -4707,7 +4723,7 @@
       "traits": {
         "smithy.api#length": {
           "min": 1,
-          "max": 1024
+          "max": 700
         },
         "smithy.api#pattern": "^[\\s\\S]+$"
       }