diff --git a/.circleci/config.yml b/.circleci/config.yml
index 6aa059842..78ac98828 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -82,6 +82,9 @@ jobs:
           name: Build all code to JavaScript
           command: yarn build
       - run: echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" >> ~/.npmrc
+      - run:
+          name: Publish on the beta tag
+          command: yarn lerna publish $(npx semver --preid beta -i prerelease $(npm show @stoplight/prism-cli@beta version)) --no-push --no-git-tag-version --dist-tag beta -y
       - run:
           name: Publish
           command: yarn lerna publish from-git --create-release=github --yes
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3005bdd0a..80d96721f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 # Unreleased
 
+## Fixed
+
+- Prism is not returning an error anymore when trying to construct a schema for HTTP headers and query string with mixed cases property names [#1268](https://github.com/stoplightio/prism/pull/1268)
+
 ## Changed
 
 - **BREAKING**: The `getHttpOperationsFromSpec` has been moved from the HTTP Package to the CLI package. If you're using Prism programmatically, this might require some code changes on your side. `getHttpOperationsFromResource` has been removed. [#1009](https://github.com/stoplightio/prism/pull/1009), [#1192](https://github.com/stoplightio/prism/pull/1192)
diff --git a/package.json b/package.json
index 3d2588c98..edc424b01 100644
--- a/package.json
+++ b/package.json
@@ -16,8 +16,6 @@
     "posttest": "yarn lint",
     "test": "jest",
     "release": "lerna version",
-    "prerelease:beta": "yarn build",
-    "release:beta": "lerna publish --preid beta --force-publish=* --no-push --no-git-tag-version --dist-tag beta",
     "prebuild.binary": "yarn build",
     "build.binary": "npx pkg --output ./cli-binaries/prism-cli ./packages/cli/",
     "test.harness": "jest -c ./jest.harness.config.js"
diff --git a/packages/http/src/validator/validators/params.ts b/packages/http/src/validator/validators/params.ts
index 76931fead..3f6175d6b 100644
--- a/packages/http/src/validator/validators/params.ts
+++ b/packages/http/src/validator/validators/params.ts
@@ -2,7 +2,7 @@ import { DiagnosticSeverity, HttpParamStyles, IHttpParam } from '@stoplight/type
 import { compact, keyBy, mapKeys, mapValues, pickBy, upperFirst } from 'lodash';
 import * as E from 'fp-ts/lib/Either';
 import * as O from 'fp-ts/lib/Option';
-import { fromArray } from 'fp-ts/lib/NonEmptyArray';
+import * as NEA from 'fp-ts/lib/NonEmptyArray';
 import { pipe } from 'fp-ts/lib/pipeable';
 import { JSONSchema4 } from 'json-schema';
 import { JSONSchema } from '../../';
@@ -31,8 +31,9 @@ export class HttpParamsValidator<Target> implements IHttpValidator<Target, IHttp
       }));
 
     return pipe(
-      createJsonSchemaFromParams(specs),
-      O.map(schema => {
+      NEA.fromArray(specs),
+      O.map(specs => {
+        const schema = createJsonSchemaFromParams(specs);
         const parameterValues = pickBy(
           mapValues(
             keyBy(specs, s => s.name.toLowerCase()),
@@ -47,7 +48,7 @@ export class HttpParamsValidator<Target> implements IHttpValidator<Target, IHttp
                   // the validators a bit
                   // @ts-ignore
                   mapKeys(target, (_value, key) => key.toLowerCase()),
-                  schema.properties && (schema.properties[el.name] as JSONSchema4),
+                  schema.properties && (schema.properties[el.name.toLowerCase()] as JSONSchema4),
                   el.explode || false
                 );
 
@@ -59,26 +60,23 @@ export class HttpParamsValidator<Target> implements IHttpValidator<Target, IHttp
       }),
       O.chain(({ parameterValues, schema }) => validateAgainstSchema(parameterValues, schema, true, prefix)),
       O.map(schemaDiagnostic => schemaDiagnostic.concat(deprecatedWarnings)),
-      O.chain(fromArray),
-      O.alt(() => fromArray(deprecatedWarnings)),
+      O.chain(NEA.fromArray),
+      O.alt(() => NEA.fromArray(deprecatedWarnings)),
       E.fromOption(() => target),
       E.swap
     );
   }
 }
 
-function createJsonSchemaFromParams(params: IHttpParam[]): O.Option<JSONSchema> {
-  return pipe(
-    fromArray(params),
-    O.map(params => ({
-      type: 'object',
-      properties: pickBy(
-        mapValues(
-          keyBy(params, p => p.name.toLowerCase()),
-          'schema'
-        )
-      ) as JSONSchema4,
-      required: compact(params.map(m => (m.required ? m.name.toLowerCase() : undefined))),
-    }))
-  );
+function createJsonSchemaFromParams(params: NEA.NonEmptyArray<IHttpParam>): JSONSchema {
+  return {
+    type: 'object',
+    properties: pickBy(
+      mapValues(
+        keyBy(params, p => p.name.toLocaleLowerCase()),
+        'schema'
+      )
+    ) as JSONSchema4,
+    required: compact(params.map(m => (m.required ? m.name.toLowerCase() : undefined))),
+  };
 }
diff --git a/test-harness/specs/validate-query-params/query-param-upper-case.oas2.txt b/test-harness/specs/validate-query-params/query-param-upper-case.oas2.txt
new file mode 100644
index 000000000..c08a90de7
--- /dev/null
+++ b/test-harness/specs/validate-query-params/query-param-upper-case.oas2.txt
@@ -0,0 +1,32 @@
+====test====
+When I send a request to an operation
+And the operation has a query param specified in mixed between lowercase and uppercase
+And in the request I sent that param is present in a different casing
+It should still pass the validation
+====spec====
+swagger: '2.0'
+produces:
+  - application/json
+paths:
+  "/v1/test":
+    get:
+      parameters:
+      - collectionFormat: csv
+        in: query
+        items:
+          format: uuid
+          type: string
+        name: filter[somethingId]
+        required: false
+        type: array
+      responses:
+        '200':
+          description: OK
+          examples:
+            error: false
+====server====
+mock -p 4010 ${document}
+====command====
+curl -sIXGET http://127.0.0.1:4010/v1/test?somethingid=04fc0172-1943-4c38-8e0f-36935e05b8dd
+====expect====
+HTTP/1.1 200 OK