diff --git a/DiscImageChef.Checksums/Adler32Context.cs b/DiscImageChef.Checksums/Adler32Context.cs
index 1b1103cb..e03f7635 100644
--- a/DiscImageChef.Checksums/Adler32Context.cs
+++ b/DiscImageChef.Checksums/Adler32Context.cs
@@ -137,6 +137,8 @@ namespace DiscImageChef.Checksums
                 adlerOutput.Append(hash[i].ToString("x2"));
             }
 
+            fileStream.Close();
+
             return adlerOutput.ToString();
         }
 
diff --git a/DiscImageChef.Checksums/CRC16Context.cs b/DiscImageChef.Checksums/CRC16Context.cs
index 1ab16d13..adbfe498 100644
--- a/DiscImageChef.Checksums/CRC16Context.cs
+++ b/DiscImageChef.Checksums/CRC16Context.cs
@@ -163,6 +163,8 @@ namespace DiscImageChef.Checksums
                 crc16Output.Append(hash[i].ToString("x2"));
             }
 
+            fileStream.Close();
+
             return crc16Output.ToString();
         }
 
diff --git a/DiscImageChef.Checksums/CRC32Context.cs b/DiscImageChef.Checksums/CRC32Context.cs
index b560b942..69d0dc16 100644
--- a/DiscImageChef.Checksums/CRC32Context.cs
+++ b/DiscImageChef.Checksums/CRC32Context.cs
@@ -163,6 +163,8 @@ namespace DiscImageChef.Checksums
                 crc32Output.Append(hash[i].ToString("x2"));
             }
 
+            fileStream.Close();
+
             return crc32Output.ToString();
         }
 
diff --git a/DiscImageChef.Checksums/CRC64Context.cs b/DiscImageChef.Checksums/CRC64Context.cs
index 10b616ab..7e7d8e17 100644
--- a/DiscImageChef.Checksums/CRC64Context.cs
+++ b/DiscImageChef.Checksums/CRC64Context.cs
@@ -163,6 +163,8 @@ namespace DiscImageChef.Checksums
                 crc64Output.Append(hash[i].ToString("x2"));
             }
 
+            fileStream.Close();
+
             return crc64Output.ToString();
         }
 
diff --git a/DiscImageChef.Checksums/MD5Context.cs b/DiscImageChef.Checksums/MD5Context.cs
index 9f6614c5..b1e50f80 100644
--- a/DiscImageChef.Checksums/MD5Context.cs
+++ b/DiscImageChef.Checksums/MD5Context.cs
@@ -102,7 +102,9 @@ namespace DiscImageChef.Checksums
         public byte[] File(string filename)
         {
             FileStream fileStream = new FileStream(filename, FileMode.Open);
-            return _md5Provider.ComputeHash(fileStream);
+            byte[] result = _md5Provider.ComputeHash(fileStream);
+            fileStream.Close();
+            return result;
         }
 
         /// <summary>
@@ -121,6 +123,8 @@ namespace DiscImageChef.Checksums
                 md5Output.Append(hash[i].ToString("x2"));
             }
 
+            fileStream.Close();
+
             return md5Output.ToString();
         }
 
diff --git a/DiscImageChef.Checksums/RIPEMD160Context.cs b/DiscImageChef.Checksums/RIPEMD160Context.cs
index f18f31e5..5fb43a2f 100644
--- a/DiscImageChef.Checksums/RIPEMD160Context.cs
+++ b/DiscImageChef.Checksums/RIPEMD160Context.cs
@@ -102,7 +102,9 @@ namespace DiscImageChef.Checksums
         public byte[] File(string filename)
         {
             FileStream fileStream = new FileStream(filename, FileMode.Open);
-            return _ripemd160Provider.ComputeHash(fileStream);
+            byte[] result = _ripemd160Provider.ComputeHash(fileStream);
+            fileStream.Close();
+            return result;
         }
 
         /// <summary>
@@ -121,6 +123,8 @@ namespace DiscImageChef.Checksums
                 ripemd160Output.Append(hash[i].ToString("x2"));
             }
 
+            fileStream.Close();
+
             return ripemd160Output.ToString();
         }
 
diff --git a/DiscImageChef.Checksums/SHA1Context.cs b/DiscImageChef.Checksums/SHA1Context.cs
index 658ee5f1..b79e7ee1 100644
--- a/DiscImageChef.Checksums/SHA1Context.cs
+++ b/DiscImageChef.Checksums/SHA1Context.cs
@@ -102,7 +102,9 @@ namespace DiscImageChef.Checksums
         public byte[] File(string filename)
         {
             FileStream fileStream = new FileStream(filename, FileMode.Open);
-            return _sha1Provider.ComputeHash(fileStream);
+            byte[] result = _sha1Provider.ComputeHash(fileStream);
+            fileStream.Close();
+            return result;
         }
 
         /// <summary>
@@ -121,6 +123,8 @@ namespace DiscImageChef.Checksums
                 sha1Output.Append(hash[i].ToString("x2"));
             }
 
+            fileStream.Close();
+
             return sha1Output.ToString();
         }
 
diff --git a/DiscImageChef.Checksums/SHA256Context.cs b/DiscImageChef.Checksums/SHA256Context.cs
index ba655098..cb8c4068 100644
--- a/DiscImageChef.Checksums/SHA256Context.cs
+++ b/DiscImageChef.Checksums/SHA256Context.cs
@@ -102,7 +102,9 @@ namespace DiscImageChef.Checksums
         public byte[] File(string filename)
         {
             FileStream fileStream = new FileStream(filename, FileMode.Open);
-            return _sha256Provider.ComputeHash(fileStream);
+            byte[] result = _sha256Provider.ComputeHash(fileStream);
+            fileStream.Close();
+            return result;
         }
 
         /// <summary>
@@ -121,6 +123,8 @@ namespace DiscImageChef.Checksums
                 sha256Output.Append(hash[i].ToString("x2"));
             }
 
+            fileStream.Close();
+
             return sha256Output.ToString();
         }
 
diff --git a/DiscImageChef.Checksums/SHA384Context.cs b/DiscImageChef.Checksums/SHA384Context.cs
index 50d31c85..95852ef6 100644
--- a/DiscImageChef.Checksums/SHA384Context.cs
+++ b/DiscImageChef.Checksums/SHA384Context.cs
@@ -102,7 +102,9 @@ namespace DiscImageChef.Checksums
         public byte[] File(string filename)
         {
             FileStream fileStream = new FileStream(filename, FileMode.Open);
-            return _sha384Provider.ComputeHash(fileStream);
+            byte[] result = _sha384Provider.ComputeHash(fileStream);
+            fileStream.Close();
+            return result;
         }
 
         /// <summary>
@@ -121,6 +123,8 @@ namespace DiscImageChef.Checksums
                 sha384Output.Append(hash[i].ToString("x2"));
             }
 
+            fileStream.Close();
+
             return sha384Output.ToString();
         }
 
diff --git a/DiscImageChef.Checksums/SHA512Context.cs b/DiscImageChef.Checksums/SHA512Context.cs
index fe7cd080..fc50fc5d 100644
--- a/DiscImageChef.Checksums/SHA512Context.cs
+++ b/DiscImageChef.Checksums/SHA512Context.cs
@@ -102,7 +102,9 @@ namespace DiscImageChef.Checksums
         public byte[] File(string filename)
         {
             FileStream fileStream = new FileStream(filename, FileMode.Open);
-            return _sha512Provider.ComputeHash(fileStream);
+            byte[] result = _sha512Provider.ComputeHash(fileStream);
+            fileStream.Close();
+            return result;
         }
 
         /// <summary>
@@ -121,6 +123,8 @@ namespace DiscImageChef.Checksums
                 sha512Output.Append(hash[i].ToString("x2"));
             }
 
+            fileStream.Close();
+
             return sha512Output.ToString();
         }