diff --git a/src/Server/Controllers/JobListingController.cs b/src/Server/Controllers/JobListingController.cs
index 647050c..d4f4ddf 100644
--- a/src/Server/Controllers/JobListingController.cs
+++ b/src/Server/Controllers/JobListingController.cs
@@ -1,7 +1,6 @@
 using Microsoft.AspNetCore.Mvc;
 using BoredCareers.Services.DatabaseService;
 using BoredCareers.Entities;
-using Org.BouncyCastle.Tls;
 
 namespace BoredCareers.Controllers {
     [ApiController]
diff --git a/src/Server/Services/DatabaseService/JobListing.cs b/src/Server/Services/DatabaseService/JobListing.cs
index 28029ca..5acab3d 100644
--- a/src/Server/Services/DatabaseService/JobListing.cs
+++ b/src/Server/Services/DatabaseService/JobListing.cs
@@ -17,45 +17,45 @@ namespace BoredCareers.Services.DatabaseService {
                 string limit = " LIMIT @PageSize OFFSET @PageNumber;";
 
                 List<string> Filters = new List<string>();
-                List<string> Parameters = new List<string>();
+                List<object> Parameters = new List<object>();
                 List<string> ParameterName = new List<string>();
 
                 if (PostalCodes != null) {
                     for (int i = 0; i < PostalCodes.Length; i++) {
                         Filters.Add("PostalCode");
                         Parameters.Add(PostalCodes[i]);
-                        ParameterName.Add("@PostalCode" + i);
+                        ParameterName.Add(" = @PostalCode" + i);
                     }
                 }
 
                 if (CountryCode != null) {
                     Filters.Add("Country");
                     Parameters.Add(CountryCode);
-                    ParameterName.Add("@CountryCode");
+                    ParameterName.Add(" = @CountryCode");
                 }
 
                 if (JobType != null) {
                     Filters.Add("JobType");
                     Parameters.Add(JobType);
-                    ParameterName.Add("@JobType");
+                    ParameterName.Add(" = @JobType");
                 }
 
                 if (Remote != null) {
                     Filters.Add("Remote");
-                    Parameters.Add(Remote.Value.ToString());
-                    ParameterName.Add("@Remote");
+                    Parameters.Add(Remote.Value);
+                    ParameterName.Add(" = @Remote");
                 }
 
                 if (SalaryMin != null) {
                     Filters.Add("SalaryMin");
-                    Parameters.Add(SalaryMin.Value.ToString());
-                    ParameterName.Add("@SalaryMin");
+                    Parameters.Add(SalaryMin.Value);
+                    ParameterName.Add(" >= @SalaryMin");
                 }
 
                 if (SalaryMax != null) {
                     Filters.Add("SalaryMax");
-                    Parameters.Add(SalaryMax.Value.ToString());
-                    ParameterName.Add("@SalaryMax");
+                    Parameters.Add(SalaryMax.Value);
+                    ParameterName.Add(" <= @SalaryMax");
                 }
 
                 string filter = " WHERE IsDeleted = False";
@@ -65,14 +65,14 @@ namespace BoredCareers.Services.DatabaseService {
                     } else {
                         filter += " AND ";
                     }
-                    filter += Filters[i] + " = " + ParameterName[i];
+                    filter += Filters[i] + ParameterName[i];
                 }
 
                 MySqlCommand cmd = new MySqlCommand(select + filter + order + limit, connection);
                 cmd.Parameters.AddWithValue("@PageSize", CountPerPage);
                 cmd.Parameters.AddWithValue("@PageNumber", (PageNumber - 1) * CountPerPage);
                 for (int i = 0; i < Filters.Count; i++) {
-                    cmd.Parameters.AddWithValue( ParameterName[i], Parameters[i] );
+                    cmd.Parameters.AddWithValue( ParameterName[i].Split(' ').Last(), Parameters[i] );
                 }
 
                 using (DbDataReader reader = await cmd.ExecuteReaderAsync()) {