diff --git a/Sources/7-Zip/7zFolder.swift b/Sources/7-Zip/7zFolder.swift
index 313af4a1..bb764d55 100644
--- a/Sources/7-Zip/7zFolder.swift
+++ b/Sources/7-Zip/7zFolder.swift
@@ -159,7 +159,7 @@ class SevenZipFolder {
                 
                 let pointerData = DataWithPointer(data: decodedData)
 
-                let decoder = try LZMA2Decoder(pointerData)
+                let decoder = LZMA2Decoder(pointerData)
                 try decoder.setDictionarySize(properties[0])
 
                 try decoder.decode()
@@ -172,7 +172,7 @@ class SevenZipFolder {
                     else { throw LZMAError.wrongProperties }
 
                 let pointerData = DataWithPointer(data: decodedData)
-                let decoder = try LZMADecoder(pointerData)
+                let decoder = LZMADecoder(pointerData)
 
                 try decoder.setProperties(properties[0])
                 decoder.resetStateAndDecoders()
@@ -183,7 +183,6 @@ class SevenZipFolder {
                 }
                 decoder.dictionarySize = dictionarySize
 
-                // TODO: Make unpackSize (and, probably, other properties) UInt64 and set uncompressed size correctly.
                 decoder.uncompressedSize = unpackSize
 
                 try decoder.decode()
diff --git a/Sources/LZMA/LZMA.swift b/Sources/LZMA/LZMA.swift
index 2a4bbc88..82f0d8e4 100644
--- a/Sources/LZMA/LZMA.swift
+++ b/Sources/LZMA/LZMA.swift
@@ -27,7 +27,7 @@ public class LZMA: DecompressionAlgorithm {
     }
 
     static func decompress(_ pointerData: DataWithPointer, uncompressedSize: UInt64? = nil) throws -> Data {
-        let decoder = try LZMADecoder(pointerData)
+        let decoder = LZMADecoder(pointerData)
 
         try decoder.setProperties(pointerData.byte())
         decoder.resetStateAndDecoders()
diff --git a/Sources/LZMA/LZMADecoder.swift b/Sources/LZMA/LZMADecoder.swift
index 76202761..47423977 100644
--- a/Sources/LZMA/LZMADecoder.swift
+++ b/Sources/LZMA/LZMADecoder.swift
@@ -65,7 +65,7 @@ class LZMADecoder {
     /// Used to select exact variable from 'IsRep', 'IsRepG0', 'IsRepG1' and 'IsRepG2' arrays.
     private var state = 0
 
-    init(_ pointerData: DataWithPointer) throws {
+    init(_ pointerData: DataWithPointer) {
         self.pointerData = pointerData
     }
 
diff --git a/Sources/LZMA2/LZMA2.swift b/Sources/LZMA2/LZMA2.swift
index 6fc1123b..a933a106 100644
--- a/Sources/LZMA2/LZMA2.swift
+++ b/Sources/LZMA2/LZMA2.swift
@@ -28,7 +28,7 @@ public class LZMA2: DecompressionAlgorithm {
     }
 
     static func decompress(_ pointerData: DataWithPointer) throws -> [UInt8] {
-        let decoder = try LZMA2Decoder(pointerData)
+        let decoder = LZMA2Decoder(pointerData)
         try decoder.setDictionarySize(pointerData.byte())
         try decoder.decode()
         return decoder.out
diff --git a/Sources/LZMA2/LZMA2Decoder.swift b/Sources/LZMA2/LZMA2Decoder.swift
index 9ce362f7..a08a5d26 100644
--- a/Sources/LZMA2/LZMA2Decoder.swift
+++ b/Sources/LZMA2/LZMA2Decoder.swift
@@ -14,9 +14,9 @@ class LZMA2Decoder {
         return self.decoder.out
     }
 
-    init(_ pointerData: DataWithPointer) throws {
+    init(_ pointerData: DataWithPointer) {
         self.pointerData = pointerData
-        self.decoder = try LZMADecoder(pointerData)
+        self.decoder = LZMADecoder(pointerData)
     }
 
     func setDictionarySize(_ byte: UInt8) throws {
diff --git a/Sources/XZ/XZBlock.swift b/Sources/XZ/XZBlock.swift
index 73b7f0d8..b0a3f51b 100644
--- a/Sources/XZ/XZBlock.swift
+++ b/Sources/XZ/XZBlock.swift
@@ -45,7 +45,7 @@ struct XZBlock {
                 /// In case of LZMA2 filters property is a dicitonary size.
                 let filterPropeties = pointerData.byte()
                 let closure = { (dwp: DataWithPointer) -> Data in
-                    let decoder = try LZMA2Decoder(pointerData)
+                    let decoder = LZMA2Decoder(pointerData)
                     try decoder.setDictionarySize(filterPropeties)
 
                     try decoder.decode()