diff --git a/apify-api/openapi/components/schemas/actors/Version.yaml b/apify-api/openapi/components/schemas/actors/Version.yaml
index 60854403e7..ded5169247 100644
--- a/apify-api/openapi/components/schemas/actors/Version.yaml
+++ b/apify-api/openapi/components/schemas/actors/Version.yaml
@@ -26,9 +26,9 @@ properties:
     examples: [false]
     description: Whether to inject the environment variables at build time.
   buildTag:
-    type: string
+    type: [string, "null"]
     examples: [latest]
-    description: The tag name to apply to a successful build of this version.
+    description: The tag name to apply to a successful build of this version. Can be `null` when the version has no build tag.
   sourceFiles:
     $ref: ./VersionSourceFiles.yaml
     description: Applies when the `sourceType` is `SOURCE_FILES`. Represents the Actor's
diff --git a/apify-api/openapi/components/schemas/store/StoreListActor.yaml b/apify-api/openapi/components/schemas/store/StoreListActor.yaml
index ee1208e4a2..5b4505c5e1 100644
--- a/apify-api/openapi/components/schemas/store/StoreListActor.yaml
+++ b/apify-api/openapi/components/schemas/store/StoreListActor.yaml
@@ -4,8 +4,6 @@ required:
   - title
   - name
   - username
-  - userFullName
-  - description
   - stats
   - currentPricingInfo
 type: object
@@ -23,10 +21,10 @@ properties:
     type: string
     examples: [jane35]
   userFullName:
-    type: string
+    type: [string, "null"]
     examples: [Jane H. Doe]
   description:
-    type: string
+    type: [string, "null"]
     examples: [My public actor!]
   categories:
     type: array
diff --git a/apify-api/openapi/components/schemas/users/Plan.yaml b/apify-api/openapi/components/schemas/users/Plan.yaml
index 0e3c9bd4cb..d811eb30f0 100644
--- a/apify-api/openapi/components/schemas/users/Plan.yaml
+++ b/apify-api/openapi/components/schemas/users/Plan.yaml
@@ -1,24 +1,6 @@
 title: Plan
 required:
-  - id
-  - description
-  - isEnabled
-  - monthlyBasePriceUsd
-  - monthlyUsageCreditsUsd
-  - enabledPlatformFeatures
-  - maxMonthlyUsageUsd
-  - maxActorMemoryGbytes
-  - maxMonthlyActorComputeUnits
-  - maxMonthlyResidentialProxyGbytes
-  - maxMonthlyProxySerps
-  - maxMonthlyExternalDataTransferGbytes
-  - maxActorCount
-  - maxActorTaskCount
-  - dataRetentionDays
   - availableProxyGroups
-  - teamAccountSeatCount
-  - supportLevel
-  - availableAddOns
 type: object
 properties:
   id:
diff --git a/apify-api/openapi/components/schemas/users/UserPrivateInfo.yaml b/apify-api/openapi/components/schemas/users/UserPrivateInfo.yaml
index f0ca851990..4443cc5d8d 100644
--- a/apify-api/openapi/components/schemas/users/UserPrivateInfo.yaml
+++ b/apify-api/openapi/components/schemas/users/UserPrivateInfo.yaml
@@ -1,13 +1,9 @@
 title: UserPrivateInfo
 required:
-  - id
   - username
-  - profile
-  - email
   - proxy
   - plan
   - effectivePlatformFeatures
-  - createdAt
   - isPaying
 type: object
 properties: