diff --git a/etc/example.env b/etc/example.env
index 068fcd2..cf17d30 100644
--- a/etc/example.env
+++ b/etc/example.env
@@ -2,7 +2,7 @@
 
 GOHAN_DEBUG=false
 GOHAN_SERVICE_CONTACT=someone@somewhere.ca
-GOHAN_SEMVER=5.0.0
+GOHAN_SEMVER=5.0.1
 GOHAN_SERVICES="gateway api elasticsearch kibana drs authorization"
 
 # GOOS=linux
@@ -39,8 +39,8 @@ GOHAN_API_IMAGE=gohan-api
 GOHAN_API_VERSION=latest
 
 GOHAN_API_BUILDER_BASE_IMAGE=golang:1.21-bookworm
-GOHAN_API_DEV_BASE_IMAGE=ghcr.io/bento-platform/bento_base_image:golang-debian-2023.12.01
-GOHAN_API_PROD_BASE_IMAGE=ghcr.io/bento-platform/bento_base_image:plain-debian-2023.12.01
+GOHAN_API_DEV_BASE_IMAGE=ghcr.io/bento-platform/bento_base_image:golang-debian-2024.05.01
+GOHAN_API_PROD_BASE_IMAGE=ghcr.io/bento-platform/bento_base_image:plain-debian-2024.05.01
 
 GOHAN_API_CONTAINER_NAME=gohan-api
 GOHAN_API_SERVICE_HOST=0.0.0.0
diff --git a/src/api/dev.Dockerfile b/src/api/dev.Dockerfile
index 2b81011..a921cbf 100644
--- a/src/api/dev.Dockerfile
+++ b/src/api/dev.Dockerfile
@@ -25,7 +25,7 @@ RUN apt-get update -y && \
     apt-get install -y tabix && \
     rm -rf /var/lib/apt/lists/*
 
-RUN go install github.com/cosmtrek/air@latest
+RUN go install github.com/cosmtrek/air@v1.49.0
 
 COPY go.mod go.sum ./
 RUN go mod download && go mod vendor
diff --git a/src/api/models/schemas/schemas.go b/src/api/models/schemas/schemas.go
index 6077c20..c838986 100644
--- a/src/api/models/schemas/schemas.go
+++ b/src/api/models/schemas/schemas.go
@@ -47,12 +47,6 @@ var VARIANT_SCHEMA Schema = map[string]interface{}{
 	"properties": map[string]interface{}{
 		"assembly_id": map[string]interface{}{
 			"description": "Reference genome assembly ID.",
-			"enum": []string{
-				"GRCh38",
-				"GRCh37",
-				"NCBI36",
-				"Other",
-			},
 			"search": map[string]interface{}{
 				"canNegate": false,
 				"operations": []string{